That's actually pretty good, considering your latitude and altitude, compared to here in Missoula at 3000'msl. I had about 104. Like you, here, there always seems to be a hard frost in the first week of May which sometimes gets the newly burst buds. Then, something like that mid-September hard freeze we had a few weeks ago, two nights in a row that required me to use the sprinklers, but the ice protected the leaves and while a few yellowed early (on one of my PN vines) everything else came through great. The commercial guy in the valley (Ten Spoons - I had a link on my thread) said he lost 15-20 percent of his vines and linked that to production loss, so he must have had a harder, longer frost... and he was using a helicopter to blow air!.
I think I lost 50% of my crop last year to birds - even with the netting. This year, I caught at least two flickers in the nets - they got in through small gaps - and blasted them with three firecrackers and they didn't come back. I hope they remember it next year because I think they were the ones that were here LAST year!
All in all, about half the vines had good production. Maybe 10 percent so-so. And, a few had NO clusters at all... could have been pollination or something, but no baby grapes ever appeared - just leafy and leggy canes.
But... it keeps me thinking, and... out of the bars at night!