Those numbers seem really low for a hundred year of shenanigans. I am less concerned by the mountaineers that climbed it alongside Sherpas at one point, and am more poking at the rich dickheads who have created the climb Mt Everest industry where Sherpas make sure everything is safe before the dickhead even wakes up. All just to say they climbed the mountain. So maybe at least use statistics from the current decade. It took another 31 years since the first attempt made for an Edmund Hillary and Tenzing Norgay to succeed.
That was my first thought as well. They have to take the same trek, do additional work in it, yet do not have the financial resources to buy the same type of gear... nor can they complain b/c "that's the job". :-|