United States Of America (USA)
The United States dollar (sign: $; code: USD) is the official currency of the United States
Washington, D.C. since 1790.
List of former US capitals:
New York City, Trenton (New Jersey), Annapolis (Maryland), Princeton (New Jersey), York (Pennsylvania), Lancaster (Pennsylvania), Baltimore (Maryland), Philadelphia (Pennsylvania).
The United States of America is located in North America.
Estimated population (2015): 321,729,000
Estimated population (2000): 281,421,906
Estimated population (1950): 151,325,798
Estimated population (1900): 76,212,168
Estimated population (1800): 5,236,631
American flag consists of 13 equal alternating horizontal stripes of red and white, with a blue rectangle in the canton (referred to as the "union") bearing fifty small, white stars. The 50 stars on the flag represent the 50 states of the United States of America, and the 13 stripes represent the 13 British colonies that declared independence from the Kingdom of Great Britain.
American flag has changed over the time, but it has maintained its shape and form. The only change to the American flag is the number of starts on it that represents the states. Here is some of the old American flags:
This was the colonial flag of the US, before independence:
The United States of America has the world's largest national economy since at least the 1890s. The U.S. dollar is the dominant currency used in international trade and is the world's main reserve currency. Also the U.S. dollar is used as the official currency of several countries. The United States has a diverse economy with a stable GDP growth rate, a moderate unemployment rate, and high levels of investment in research. The United States has the world's largest influential financial markets. The New York Stock Exchange for example is by far the world's largest stock exchange. The United States has the largest consumer market in the world, and its labor market has attracted immigrants from all over the world.
The US is rich in natural resources, has a well-developed infrastructure, and has high productivity. It is currently the world's largest producer of oil and natural gas. It is the world's second largest manufacturer. Of the world's 500 largest companies, 128 are head quartered in the US.
The main trading partners of US are: Canada, China, Mexico, Japan, Germany, South Korea, and the United Kingdom.
On the other hand, households living on less than $2 per day before government benefits, has increased significantly in US from 1996 levels. The gap in income between rich and poor is very bigger in the US than in any other developed country. Total public and private debt was $50 trillion at the end of the first quarter of 2010.
The most popular U.S. cities among international travellers
New York City