According to the New York Times, 158 families funded about half of the presidential campaigns so far. With great effect, the Times used Monopoly house and hotel pieces to show this number. The main point of impact comes from the scaled comparison at the beginning, against the backdrop of the White House.
Monopoly pieces to show presidential funding
Life expectancy changes
The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.
10 Best Data Visualization Projects of 2015
These are my picks for the best of 2015. As usual, they could easily appear in a different order on a different day, and there are projects not on the list that were also excellent.