Here's an interesting statistic that I ran across recently that is related to the last class.
Which is the only country in the world where mandatory contraceptive courses are required for both men and women before a marriage license can be obtained?
No, it isn't China.
Highlight the answer if you are curious--> Iran
For the most up to date information on population trends the 2008 revision of the UN's World Population Prospects is available here. The Population division website has links to lots more data.