Public Data Visualizer...

Here's a fascinating tool from Google that lets you visualize quite a few different sets of publicly-available data.  At right is a snapshot of fertility rates for some countries I picked, along with the world as a whole.  Note how the world's fertility rate is falling inexorably toward the “replacement rate” of 2.1 (the point at which the population stops growing).

When you click onto the tool, click on the box that says “Fertility Rate” to change what data set you're looking at.  Pick the countries you'd like to see on the check-box list at the left...