The problem is defining 'non-violent'. Is it just showing up to a protest from 5pm to 6pm with a sign? Is it a general strike that will undoubtedly harm the economy? Is it demonstrating that you could respond to violence effectively and daring them to up the scales?

So there were 323 events investigated but there's some criteria that should be taken into account for violent resistances that is not - for instance zero of the resistances to the Nazi occupations during World War 2 succeeded by their definition, and off the top of my head only the Yugoslavian resistance really put up a substantial dent in the occupation and still required the Soviet army invasion to kick the Nazis out.