Always have, 60%+.
Edit to correct numbers and dates of super majority requirement for constitutional amendments to Colorado's constitution.
On November 8, 2016, however, Colorado voters approved?Amendment 71, an?initiated constitutional amendment?that imposed a?55 percent supermajority vote?for constitutional amendments, including both?initiated constitutional amendments?and?legislatively referred constitutional amendments.?
If you're unarmed, you are a victim.