According to the Daily Telegraph, of the 1.6 million votes cast Wiggins received 492,064 votes, finishing well clear of two other 2012 champions, runner-up Jessica Ennis, the heptathlon champion, on 372,765 and third-placed Andy Murray, the tennis gold medallist and US Open champion, who received 230,444.
That doesn't leave many votes split between the other 9, so Andy really did do quite well!!
Re. those voting figure RTs - Andy got more votes this year than Cav got when he won SPOTY in 2011 (and 12x what he himself got last year)