This visualization shows two things. On the top chart, it's a tree map, or what I like to call a sheet cake map. Think of all the money in all the endowments as one big bowl of batter baked into a cake, and then, once baked, sliced up into pieces. The size of the piece is that institution's endowment as a part of the whole.
The bottom chart shows ten years of endowments, measured at the start of the fiscal year shown, so you can see the hits in 2008--2009 and the overall growth over time. Of interest There are only three private universities in US who had a total endowment in 2012 equal to the ten-year growth of Harvard's.
If you click on an institution, the line chart at the bottom will filter to just that college over time. If you hover over a line on the bottom chart, it will highlight the instituion on the top so you can see its place in the endowment universe.
What do you see?