Those are old percentages.....
There are more apple OS computers out there, but the point really is that the most popular OS is the most likely to be targeted..
It just is what it is.
Identity theft is really more of a function of data that other entities have because you gave it to them and then they were hacked.
It really has little to do with your personal PC.
A lot of my military retired, and active duty friends, would dispute that opinion.