I'm surprised that 2 and 20 isn't on a progressive scale. 2 and 20 for the first 20mm, then 1 and 20 for the next 20mm and to keep on reducing the first part o

I'm surprised that 2 and 20 isn't on a progressive scale. 2 and 20 for the first 20mm, then 1 and 20 for the next 20mm and to keep on reducing the first part of the % point until it's 0 and 20.