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This amounts to 466,383 serves in total and is down from almost 93% last year.
Jerseys are the next highest, with 6.7% or 34,003 serves, up from 5.6% in 2016.
Mountbelliarde, Norweigian Red and Fleckvieh are the next most used, with the three making up just over 1.2%.
AI serves by AI handheld devices increased by 7% from this time 12 months ago, from 48,375 compared with the same date in 2016.
There were 498,702 serves to the end of June 2017, compared with 450,327 to the end of June 2016.
The national dairy herd grew by 2.2% over the past 12 months.
Chinese dairy imports soar in June
Dairy markets: US dairy farmers keep the milk tap flowing
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