Ahhh, good point. They are measuring people who were prosecuted for holocaust denial, which could of course mean that some prosecutors were more motivated to prosecute that last year, not that it actually increased.
Can’t imagine it’s very common at a criminal level, though I don’t like speech laws and can’t imagine why Canada needs them. Germany, I understand, given their history. I can recall two prominent cases though, Earnest Zundel, and he went far past Holocaust Denial. And it’s a couple decades ago. And David Ahenakew of the Canadian First Nations, and he only justified it. A decade plus ago. That could well be the baseline