I don't know if I can give a precise figure. As you're asking for my personal opinion though, here are my thoughts.What in your opinion is a high enough vaccination rate to call it day and remove measures?
Measures aren't all created equal. Lockdowns are much harsher than wearing a mask in a supermarket or telling kids to stay home from school if they're in contact with someone with covid.
It appears that SARS-COV-2 will become an endemic virus that leads to a common cold. This isn't due to virus mutation, it's due to our immunity developing. At some point, we'll all have enough vaccinations or infections that we shrug it off with a bit of a sniffle.
However, we're not there yet and hospitals are going to be rammed with covid patients this winter. Overloading hospital capacity affects all of us, not just covid patients.
So until covid becomes endemic (probably next year, thanks to vaccination rollout and the Delta variant), we should probably still be vigilant. Wear a mask indoors in public areas, get tested if you have symptoms and of course, get vaccinated and get a booster when eligible.
@Splinty will know more and can probably give better advice.