Insurers estimate of the population of gamers

In my quest to find data points on how many D&D players there are out there I stumbled upon this "The tabletop gamers’ survey" by Compare The Market - the general gist of which is "there are a lot of gamers out there, have you got insurance for all those out of print RPG books and precious, precious miniatures?" - which fair play, they are transparent in their angle in all of this, respect the hustle and so on. They do give us some interesting insight with a 3000 person survey equally split across the US, Canada and Australia - finding that ~ 30% of US and Canadians (about half that for Australia) play or played tabletop games and the most popular of those games in every case was Dungeons and Dragons. Their focus was a little unusual because it was about the physical stuff - with questions like 'I play, but I always borrowed minis' - more than whether people were current or lapsed players. If we bucket it all together as 'how many folk ever played D&D - now or in the past' we can…