If you’re looking for some data to play with, FiveThirtyEight just made it easier to download their data and code. They’ve been on GitHub, I think from the beginning, but this data page is even more straightforward and to the point.
FiveThirtyEight datasets available for download
Life expectancy changes
The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.
Where Bars Outnumber Grocery Stores
A closer look at the age old question of where there are more bars than grocery stores, and vice versa.