It was interesting. In the 2005 referendum, voters had a choice of declining one ballot or the other, which led to incredible problems in balancing the ballots at the end of the night. The decision taken for 2009 was that everybody was getting both ballots if they showed up to vote. They were told that if they didn't want to vote in one or the other, they could leave the ballot blank, and then it was rejected.
The number of rejected ballots—and I don't have it at the tip of my tongue—was higher in the referendum than it was in the election. There was certainly a phenomenon of people leaving their ballots blank. It was 2% or 3%.