Even though it isn´t consider a revolution, I know, that in the sixties only a small fraction of the population toke part in the social change movement. If I remember correctly, for Germany it was something like 3 to 7%. How many where part of the Russian or French Revolution? If you have sources for any further details, I´d appreciate that as well. Thanks.
Goodness Beyond Virtue by Patrice Higonnet cites Crane Brinton's estimates of the percentage of Jacobins in France during the Revolution. Brinton says the total number of people who joined the clubs (Jacobin or other) was around one million, out of 25 000 000 inhabitants, though class and gender would have excluded many from joining even if they wanted to. Between 2 and 4% of the population were sympathizers who joined at some point, though Higonnet adds that some estimates are half of that. In Marseilles they were 4.4% of the population and 5% in Rouen. As many as one French male in six or seven was committed to Jacobinism at some point.
Of course, membership in popular societies was only one way to participate, and only men who could pay the membership fee were able to join the Jacobins. I can't think of any sources with more general statistics, though.