Up to the end of 2014 there has been 193 ascents to the summit of Mount Everest without oxygen. Not very many when you consider that there has been around 5,000 people who have reached the summit of the highest mountain in the world.
To date (end of 2017) there has been208 climbers who have climbed Mount Everest without using oxygen cylinders (tanks) and 8,098 who have used oxygen cylinders.
Over 5,000 people have successfully climbed Mount Everest to date.
By now severa thousand people have climbed Everest. It'd be too long to post a list - if one exists - here.
If you mean how many people climbed to the summit of Mount Everest in 1953 then the answer is 2, Edmund Hillary and Tenzing Norgay.
Yes, plenty of people.
5
Because
roughly 5,294 people
There has been about 3,000 people who've climbed it, and about 5,000 ascents up it
38
Jack Hill
because of fun and the world record