I don't have access to the breeding records from the 70's & 80's. We started doing AI in the early 80's FWIW but still live covered some of our mares here on the farm until the mid 90's.
All plain text foals were AI.
Frozen are in caps.
* - Live cover.
It feels lime I have been doing this forever, but since I bought my stock as youngsters, the timeframe has been prolonged by at least 3 years. I have only used fresh AI and my results are 8:3 in favor of the girls. And I love my girls! Peg