Every year since 1990, the United Nations Development Programme has studied the quality of life in many countries.
The Human Development Index
is the result of this study. The index uses factors such as life expectancy, adult literacy rate and per capita income to determine the rankings. Of the 179 countries studied in the 2006 report, Iceland topped the list, with an HDI of 0.968, followed closely by Norway, Canada and Australia. The HDI for United States was 0.950, which puts it in 15th place. At the bottom of the list were The Democratic Republic of the Congo, Central African Republic and Sierra Leone. Read the full Human Development Report here, read individual country reports here or visit the Web site to learn more.