There are many reason why climbers get killed or die on Mount Everest.
Avalanche
Illness
The weather
Fall
Around 5,000 people from all over the world have reached the summit of Mount Everest to date. Nearly all of them survived their climb.
Around 5,000 have survived climbing on Mount Everest. They reached the summit and got back down alive.
Around 8,300 people from all over the world have reached the summit of Mount Everest and survived the descent to Base Camp to date (2017).
Every climber that has been on Mount Everest and back to Base Camp can say they survived while on Everest.
Around 7,000 people from all over the world have reached the summit of Mount Everest to date and have all survived from their experience on the mountain.
Over the years thousands of climbers have reached the top on Mount Everest and survived, hundreds try every year.
Around 7,000 people from all over the world have reached the summit of Mount Everest to date. Nearly all of them survived their expedition and returned home safe and well.
From 2005 up to the end of 2015 there has been 4,745 climbers reach the summit of Mount Everest with 22 of them dying on the mountain.
Sir Edmund Hillary climbed and survived!!
There were 8 people who died on Mount Everest during the terrible storm on the 10/11th May 1996:Andrew HarrisDoug HansenRob HallYasuko NambaScott FischerSubedar Tsewang SamanlaLance Naik Dorje MorupTsewang Paljor
It would be impossible to list all the names of climbers who have died on Mount Everest and those who have survived their climb. To date (2016) there has been around 280 people die on the mountain and around 7,000 who reached the summit and survived.
Don't Think there's any number for that. Has to be thousands. It doesn't really get dangerous and unhealthy until you're at about 5000 meters altitude or more. Hiking below that level is generally fine.