I lost some event data which led to some wrong results (thanks Ether for catching that). The new distribution and lists are below. It still doesn't match sdangelo's though, unfortunately.
Code:
OP num # of teams
0 1
1 38
2 191
3 465
4 322
5 96
6 11
7 1
I manually checked all the teams with an OP number <= 1, and I believe the 38 is correct.
Spoiler for teams that have won with OP:
Code:
row # team event(s)
1 118 2016onto
2 176 2007on
3 217 2011roc
4 254 2014onwa
5 296 2010wat
6 330 2015gal
7 492 2015gal
8 746 2016onto
9 771 2007wat
10 781 2011on2
11 865 2014onwa
12 910 2016onwi
13 1114 2007on, 2007wat, 2008on, 2008wat, 2009on, 2010on, 2010wat, 2011wat, 2012arc, 2012on, 2012wat, 2013onto, 2013onto2, 2013onwa, 2014onwi, 2015onwa, 2015onwi
14 1219 2012on
15 1325 2013onto
16 1518 2011roc
17 1547 2010on, 2011on2
18 1625 2010gal
19 1680 2008wat
20 2166 2008on
21 2185 2009on, 2009wat
22 2200 2012on2
23 2609 2009wat
24 2634 2016onto
25 2852 2015onto
26 3138 2010gal
27 3710 2015onto
28 3756 2011wat
29 3944 2015gal
30 4001 2012on2
31 4069 2013onwa
32 4334 2012arc
33 4372 2012wat
34 4814 2013onto2
35 4903 2015onwi
36 4920 2016onwi
37 5288 2014onwi
38 5719 2015onwa