And this is why statistics can be misleading - 72% of the population turned out for the vote. Almost a record.
It's pointless at best, actively harmful at worst, to compare the voters vs the non voters in an attempt to make the result seem undemocratic. The non voters abandoned their ability to influence this issue; if they had wanted to participate, they had plenty of opportunity to do so.
67.23% of all votes cast. Turnout was 64.62%, so 43.2% of all registered voters [1]. As fraction of total population, it was 56.23 million in 1975 [2] and the total number of Yes votes was 17,378,581, so 30.91%.
