The United States of America is world's third-largest country in terms of population. The data obtained from US census bureau predicts 295.734 millions persons residing in the US in 2005, as against an average number of 1000 million in the 'high-income countries' category.
The US, in the past, has attracted vast numbers of immigrants from around the world. Yet, the country remains less densely populated than other large countries or other industrialized nations. For a large country, the United States is also remarkably uniform linguistically and culturally. Almost 80% of the people live in urban areas and enjoy a higher life expectancy at birth of 77 years.
Average annual growth of population has been 1.1% from 1997 to 2003, which is still higher than other high-income countries figure of 0.6 %. The US economy has an edge over other rich countries as indicated by its labour force growth rate of 1.3% (1997-03), while other high income countries have less than 1% growth in workforce over these years.
Among the other human development indicators, while there is a very small number living below the poverty line, all the people in America enjoy access to an improved water source. Literacy rate over the age 15 is 100% and so is the gross primary enrollment rate, with an equitable distribution between the two sexes of the population.
US is a market-oriented economy, where private individuals and business firms make most of the decisions, and the federal and state governments buy needed goods and services predominantly in the private marketplace. The increased global integration of business and finance posed new opportunities as well as risks. All of these changes were leading people in the US to re-examine everything from how they organize their workplaces to the role of government. Perhaps as a result, many workers, while content with their current status, look to the future with uncertainty.