As of the 2009 census there are 6,664,195 people living in Washington State. If we assume that people that voted in the least popular ballot initiative voted in all the ballot initiatives then we get a maximum voter turnout percentage of 19.66%. That’s roughly 1.3 million votes.
So, hypothetically, lets say a person voted for every initiative but in every case the election went against him. How many other people voted as he did?
Well, I did the math and the answer is 130, and according to Pat the standard deviation is 11.4. So not very many. For comparison, a person who was in the majority on every initiative would have about 16820 people who agree with him.
Here is where I show my work and here is the source of my numbers.