SPRtree Growth
Bars indicate the number of nodes added to the tree each quarter since the establishment of the Academic Family Tree.
Compare to tree:

SPRtree Nodes: Quarterly Growth

83-
66-
50-
33-
17-

Jan 05 Jan 06 Jul 06 Jan 07 Jul 07 Jan 08 Jul 08 Jul 09 Jul 10 Jan 11 Jul 11 Jul 12 Jul 13 Jan 14 Jul 14 Jan 16 Jan 17 Jul 17 Jan 18 Jan 21
Quarter
 SPRtree 

Node vs. connection growth
It's also interesting to compare the rate of growth of nodes vs. connections. So far, they've grown at a similar pace, but as the tree is getting larger, the number of new connections seems to be gradually outpacing the number of new nodes.

SPRtree: Nodes vs. Connections

83-
66-
50-
33-
17-

Jul 08 Jul 11 Oct 11 Jan 17 Jul 17 Jan 18 Oct 18 Apr 20 Jan 21 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000 -2000
Quarter
 New nodes  New connections 

Daily growth
A bit more detail about what has been happening during the last month.

SPRtree: Growth during last 30 days

0-
0-
0-
0-
0-

08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 01 02 03 04 05 06 07
Day
 SPRtree