With 5 weeks to go, 57% have already voted in gay marriage postal survey. October 3, 2017 compassq 5 THINGS TO KNOW, NEWS, WORLD NEWS Comments Off on With 5 weeks to go, 57% have already voted in gay marriage postal survey. MORE than nine million Australians have voted in the postal survey on gay marriage so far. Thats about 57.5 per cent of the 16 million registered voters able to take part in the $122 million postal survey.