> 1986 is forty years ago.

Epidemiologically recent (and also dofm-recent because I'm old).

But the graphs typically show that Scotland ballooned in the last twenty years, from below a hundred a year into the thousands.

Apparently in the UK it is now mostly stable, so it is endemic in deer. Much more common in middle-aged people who are I guess more likely to walk the dog and be keen active gardeners.