So, neither the x-axis nor the y-axis is linear. The age values are spaced at apparently random intervals, and I'm looking at the difference between 620M and 1.4B, and the second bar does not look like it's 2.3 times the height of the first one. So this isn't really a "graph", just some pictures with numbers attached.

Besides, a logarithmic scale for the y-axis would be much more appropriate. Turning $1B into $2B is much more impressive than turning $10B into $11B.