Restaurants run out of vegan chefs as Britons ditch meat and dairy | Food | The Guardian

https://www.theguardian.com/food/2018/nov/03/restaurants-short-of-vegan-chefs-as-brits-ditch-meat

Which made me wonder... Looks like it's about 1 in 10 for the US
https://www.forbes.com/sites/niallmccarthy/2018/08/06/who-are-americas-vegans-and-vegetarians-infographic/#75388231211c

4% of conservatives, 16% of liberals (no surprise).
13% of those earning less than $30K, 6% of those earning more than $75K (a bit of a surprise).

I'm guessing that the disparity by income is largely explained in large part by age.

The British are good gardeners so that helps. 

Americans have microwave steamer bags, which helps me eat a few more vegetables than cans. I'm half joking but it's kinda true.