How Many U.S. Dollar Bills Are There in Circulation?
When you think about it, the journey of each individual currency note is pretty incredible.
After being printed or minted, each bill is then passed between people and businesses to facilitate transactions. If it’s a $1 or $5 bill, it changes hands on average about 110 times per year – and if it’s a $20 bill, it’s more like 75. The interesting part is that almost every transaction is linked to the one before it, and the series of subsequent transactions for each bill creates a unique, broad story.
By the time a bill is retired, it would have facilitated many hundreds of transactions that enabled everything from the purchase of used cars to the shadier deals in underground markets. It’s a pretty interesting tale for such a little piece of paper.
Dollar Bills, in Aggregate
Today’s infographic from TitleMax gives a sense of what happens when all of those individual stories are combined together into one large one: the U.S. supply of currency notes, the shelf life of each type of bill, and how the whole system works as a whole.
In total, there is a total of about $1.5 trillion in U.S. physical currency in circulation, and roughly 80% of this value comes from the 11.5 billion $100 notes that are in circulation.
|Note||Number of bills in circulation|
|$1 bill||11.7 billion|
|$2 bill||1.2 billion|
|$5 bill||2.8 billion|
|$10 bill||1.9 billion|
|$20 bill||8.9 billion|
|$50 bill||1.7 billion|
|$100 bill||11.5 billion|
Of course, as we showed in All the World’s Money and Markets, this is just a fraction of the total money that exists as a whole, which includes digital deposits and liquidity added by central banks. That’s why, in the U.S. today, there’s about $14 trillion in total money supply (M2), of which physical currency makes up only about 11% of the total value.
Turnover Per Bill
Every year, the U.S. Bureau of Engraving and Printing is responsible for printing new dollars – and interestingly, 70% of these new bills are used to replace older notes going out of circulation.
That raises the question: how long does each bill last on average?
|Note||Average Life Span|
|$1 bill||5.8 years|
|$5 bill||5.5 years|
|$10 bill||4.5 years|
|$20 bill||7.9 years|
|$50 bill||8.5 years|
|$100 bill||15.0 years|
This means that printers are mostly turning out new batches of $1 and $20 bills, since there are more of those in circulation than most other bills.
At the same time, many new $100 notes are also being printed as well since they are the second most common bill. However, these last 2-3x as long as smaller denominations.
The World’s Most Powerful Reserve Currencies
Here are the reserve currencies that the world’s central banks hold onto for a rainy day.
The World’s Most Powerful Reserve Currencies
When we think of network effects, we’re usually thinking of them in the context of technology and Metcalfe’s Law.
Metcalfe’s Law states that the more users that a network has, the more valuable it is to those users. It’s a powerful idea that is exploited by companies like LinkedIn, Airbnb, or Uber — all companies that provide a more beneficial service as their networks gain more nodes.
But network effects don’t apply just to technology and related fields.
In the financial sector, for example, stock exchanges grow in utility when they have more buyers, sellers, and volume. Likewise, in international finance, a currency can become increasingly entrenched when it’s accepted, used, and trusted all over the world.
What’s a Reserve Currency?
Today’s visualization comes to us from HowMuch.net, and it breaks down foreign reserves held by countries — but what is a reserve currency, anyways?
In essence, reserve currencies (i.e. U.S. dollar, pound sterling, euro, etc.) are held on to by central banks for the following major reasons:
- To maintain a stable exchange rate for the domestic currency
- To ensure liquidity in the case of an economic or political crisis
- To provide confidence to international buyers and foreign investors
- To fulfill international obligations, such as paying down debt
- To diversify central bank portfolios, reducing overall risk
Not surprisingly, central banks benefit the most from stockpiling widely-held reserve currencies such as the U.S. dollar or the euro.
Because these currencies are accepted almost everywhere, they provide third-parties with extra confidence and perceived liquidity. This is a network effect that snowballs from the growing use of a particular reserve currency over others.
Reserve Currencies Over Time
Here is how the usage of reserve currencies has evolved over the last 15 years:
|🇺🇸 U.S. Dollar||🇪🇺 Euro||🇯🇵 Japanese Yen||🇬🇧 Pound Sterling||🌐 Other|
Over this timeframe, there have been small ups and downs in most reserve currencies.
Today, the U.S. dollar is the world’s most powerful reserve currency, making up over 61% of foreign reserves. The dollar gets an extensive network effect from its use abroad, and this translates into several advantages for the multi-trillion dollar U.S. economy.
The euro, yen, and pound sterling are the other mainstay reserve currencies, adding up to roughly 30% of foreign reserves.
Finally, the most peculiar data series above is “Other”, which grew from 2.0% to 8.4% of worldwide foreign reserves over the last 15 years. This bucket includes the Canadian dollar, the Australian dollar, the Swiss franc, and the Chinese renminbi.
There have been rumblings in the media for decades now about the rise of the Chinese renminbi as a potential new challenger on the reserve currency front.
While there are still big structural problems that will prevent this from happening as fast as some may expect, the currency is still on the rise internationally.
What will the composition of global foreign reserves look like in another 15 years?
Why Gold is Money: A Periodic Perspective
Gold has been used as money for millennia. People often attribute this to beauty, but there are basic physical properties for why gold is money.
Why Gold is Money
The economist John Maynard Keynes famously called gold a “barbarous relic”, suggesting that its usefulness as money is an artifact of the past. In an era filled with cashless transactions and hundreds of cryptocurrencies, this statement seems truer today than in Keynes’ time.
However, gold also possesses elemental properties that has made it an ideal metal for money throughout history.
Sanat Kumar, a chemical engineer from Columbia University, broke down the periodic table to show why gold has been used as a monetary metal for thousands of years.
The Periodic Table
The periodic table organizes 118 elements in rows by increasing atomic number (periods) and columns (groups) with similar electron configurations.
Just as in today’s animation, let’s apply the process of elimination to the periodic table to see why gold is money:
- Gases and Liquids
Noble gases (such as argon and helium), as well as elements such as hydrogen, nitrogen, oxygen, fluorine and chlorine are gaseous at room temperature and standard pressure. Meanwhile, mercury and bromine are liquids. As a form of money, these are implausible and impractical.
- Lanthanides and Actinides
Next, lanthanides and actinides are both generally elements that can decay and become radioactive. If you were to carry these around in your pocket they could irradiate or poison you.
- Alkali and Alkaline-Earth Metals
Alkali and alkaline earth metals are located on the left-hand side of the periodic table, and are highly reactive at standard pressure and room temperature. Some can even burst into flames.
- Transition, Post Transition Metals, and Metalloids
There are about 30 elements that are solid, nonflammable, and nontoxic. For an element to be used as money it needs to be rare, but not too rare. Nickel and copper, for example, are found throughout the Earth’s crust in relative abundance.
- Super Rare and Synthetic Elements
Osmium only exists in the Earth’s crust from meteorites. Meanwhile, synthetic elements such as rutherfordium and nihonium must be created in a laboratory.
Once the above elements are eliminated, there are only five precious metals left: platinum, palladium, rhodium, silver and gold. People have used silver as money, but it tarnishes over time. Rhodium and palladium are more recent discoveries, with limited historical uses.
Platinum and gold are the remaining elements. Platinum’s extremely high melting point would require a furnace of the Gods to melt back in ancient times, making it impractical. This leaves us with gold. It melts at a lower temperature and is malleable, making it easy to work with.
Gold as Money
Gold does not dissipate into the atmosphere, it does not burst into flames, and it does not poison or irradiate the holder. It is rare enough to make it difficult to overproduce and malleable to mint into coins, bars, and bricks. Civilizations have consistently used gold as a material of value.
Perhaps modern societies would be well-served by looking at the properties of gold, to see why it has served as money for millennia, especially when someone’s wealth could disappear in a click.
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