What are the atrocities of Mao Tse-tung?

Based on the most credible estimates, atrocities attributed to Mao follow as such:

Purged: 2 Million dead
Great Leap Forward: 31-33 Million dead
Cultural Revolution: 1 Million
Ethnic Cleansing (Tibetans): 750,000-900,000 dead
Labor Camps: 20 Million

54.75 to 56.9 Million

Source: http://users.erols.com/mwhite28/warstat1.htm#Mao