Here is a nice clip on global health. By using animated overlay graphics the statistics on income in combination with life expectancy come to live. Hans Rosling shows by using data from 200 countries over the last 200 years how life expectancy grows for all the countries in the world. At first the western countries take off rapidly, but at the end of the 20th century the 'rest' of the world catches up.
copyright: BBC Four, 2010
At the start of the scale, in 1810 life expectancy was on average only 40 years. It grows eventually to 75 years in 200 years time. In the second part of the 19th century the industrial revolution gets the ball rolling for the European countries and North America. In the beginning of the 20th century there is a decline caused by the first World War and the Spanish flu. Just after the second World War, in 1948, the difference between the West -rich- countries and the other -poor- countries was wider than ever. But in the second half of the 20th century, Asia, Latin America and even Africa, start to catch up with the rest of the western world. They gain more income and have higher life expectancy.
Hans Rosling's 200 Countries, 200 Years, 4 Minutes - The Joy of Stats - BBC Four http://www.bbc.co.uk/programmes/b00wgq0l