Notes
GDP or GDP per person is often taken as a measure of how developed a country is, but its usefulness is limited as it refers only to economic welfare. The UN Development Programme combines statistics on average and expected years of schooling and life expectancy with income levels (now GNI per person, valued in PPP US$). The HDI is shown here scaled from 0 to 100; countries scoring over 80 are considered to have very high human development, 70-79 high, 55-69 medium and those under 55 low.
Source: UN Human Development Report