I think your talking about the 'burning years'? The Witch hunts killed about 50,000 people all told in Europe in the medieval to middle ages period. Very few will have really been witches.
Burning usualy happened in Scotland and Germanic states. The final burning in Britain was an isolated case in Scotland in 1745. Hanging (like at Salem) was the most frequent style of execution, others died in 'trials of ordeal'.
Professor Ronald Hutton ( http://en.wikipedia.org/wiki/Ronald_Hutton ) exhaustively researched this issue in his book 'Triumph of the Moon'...it is a fallacy that nine million people were burned.
I was at a big Pagan event in London some years ago and heard his really good talk on the 'burning times'
Many of the people who were hung, 'dunked' or pressed to death as well as burning were people already marginalized being used as scapegoats for whatever reason.
Anyway, about 50,000 or so people.