The dollar (currency code USD) is the currency of the United States. It is normally abbreviated to the dollar sign $, or alternatively US$ to distinguish it from other dollar-denominated currencies. It is divided into 100 cents. Adopted by the United States Congress in 1785, the U.S. dollar is the most-used currency in the world. Several countries use the U.S. dollar as their official currency, and many others allow it to be used in a de facto capacity. It is also used as a reserve currency by many countries. In 1995, over US$380 billion were in circulation, of which two-thirds was outside the United States. By 2005 that figure had doubled to nearly $760 billion with an estimated half to two-thirds being held overseas, which is an annual growth of about 6.6%. Read more
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