Top 25 Prospects in the Last Two Years

WTF do these numbers mean?

1
Last Updated: August 5, 2018
.960
2
Last Updated: September 23, 2018
.919
3
Last Updated: May 21, 2018
.890
4
Last Updated: March 29, 2017
.846
5
Last Updated: September 23, 2018
.834
6
Last Updated: September 23, 2018
.808
7
Last Updated: March 29, 2017
.784
8
Last Updated: September 23, 2018
.775
9
Last Updated: September 23, 2018
.766
10
Last Updated: September 23, 2018
.765
11
Last Updated: September 23, 2018
.755
12
Last Updated: September 23, 2018
.754
13
Last Updated: September 23, 2018
.751
14
Last Updated: September 23, 2018
.742
15
Last Updated: September 23, 2018
.734
16
Last Updated: September 23, 2018
.718
17
Last Updated: May 21, 2018
.702
18
Last Updated: August 27, 2017
.701
19
Last Updated: March 29, 2017
.690
20
Last Updated: March 29, 2017
.681
21
Last Updated: July 19, 2018
.680
22
Last Updated: September 23, 2018
.679
23
Last Updated: September 23, 2018
.678
24
Last Updated: September 23, 2018
.675
25
Last Updated: September 23, 2018
.656

What Jeff thinks.