Here's the source of the data, if you're curious:
   [1]https://sks-keyservers.net/

   On Mon, Jul 29, 2013 at 4:22 PM, Tony Arcieri
   <[2]tony.arcieri@gmail.com> wrote:

   Interesting chart:
   [3]https://pbs.twimg.com/media/BQYA_qWCEAIoUFT.png
   --
   Tony Arcieri

   --
   Tony Arcieri

References

   1. https://sks-keyservers.net/
   2. mailto:tony.arcieri@gmail.com
   3. https://pbs.twimg.com/media/BQYA_qWCEAIoUFT.png