OK Steve,
Not quite 20K! Of your 19463 SOTA activator QSOs, 12314 of them are from G summits. In these, you have:
5B, 9A, 9H, 9Y, CN, CT3, DL, EI, E7, EA, EA6, EA8, ER, ES, EU, F, G, GD, GI, GJ, GM, GU, HA, HB0, HB, I, IS0, LA, LX, LY, OE, OH, OK, OM, ON, OZ, PA, PY, RA, S5, SM, SP, SV, SV9, TA, TF, UA9, UR, YL, YO, YV and ZC4.
Very impressive. No EA9 though, so that was maybe from a GW, GM or DL summit? Interesting that your EA6 in 2006 was the same as I worked this morning - EA6UN.
I will edit your extra ones into the master list.
Tom