I missed my first upgrade of the year last week due to IRROP, but had it on my original. Even being rebooked into Y, I was one seat shy of making it a 100% year.
That being said, I did use a few PMUs on flights from ATL-LAX or JFK-LAX so don't know if I would have made them.
I do avoid peak flight times (though I have taken a lot of Sunday night flights), and fly primarily through ATL.
I'd have to log in, but I'd say I'm probably close to 39/40 or so...