Interesting charts by The Economist

world GDP since Jesus

http://www.economist.com/node/16834943

The ratio of youth to adult unemployment worsens

http://www.economist.com/blogs/dailychart/2010/12/youth_unemployment

Which countries match the GDP and population of America's states?

http://www.economist.com/blogs/dailychart/2011/01/comparing_us_states_countries

What is behind rising inflation?

http://www.economist.com/blogs/dailychart/2011/01/daily_chart_inflation

A map of world alcohol consumption

http://www.economist.com/blogs/dailychart/2011/02/daily_chart_global_alcohol_consumption

How mens' waistlines have grown since 1980

http://www.economist.com/blogs/dailychart/2011/02/daily_chart_global_obesity

Which countries match the GDP, population and exports of Chinese provinces?

http://www.economist.com/content/chinese_equivalents

Mapping the Arab world -- The Economist

http://www.economist.com/blogs/dailychart/2011/02/arab_league_map

Libya has such high PPP, 3 times that of Egypt. But it is said this is caused by abundant oil resource and low population, and most wealth is concentrated in few.

Most countries have close or over 50% of population under age 25. Also see this Global Median Age by Country from Wikipedia http://en.wikipedia.org/wiki/Population_pyramid#Youth_bulge