I'm able to find the number of votes by a particular year on each election's Wikipedia page (such as https://en.wikipedia.org/wiki/California_gubernatorial_election,_2010), but they all link back to a pdf on the state website (such as http://www.sos.ca.gov/elections/sov/2010-general/complete-sov.pdf).
Have there been any attempts to aggregate this data in tabular format? I see http://openelections.net/results/#ca but it is not populated yet.
The reason I care is because I have recently found out that the gubernatorial turnout is directly related to the amount of signatures necessary to put a California proposition onto the ballot, so would like to compare the rates of the two.