They are really bad here in the Midwest US this summer (it's been consistently hot and wet). I have removed like 11 from the total of myself, my wife, my dog (accounts for 7 of the total, even on tick meds), and my son. Last year it was 2.
Well at least vaccines exist against that one... It's recommended to get it in the South of Germany if you're at risk of having ticks. There are a few hundred cases every year.
Is that number attached or crawling? If attached, how many have you caught before they dug in? I live in the same area and that number would be really low. Stumble on some deer ticks and you'd be lucky if you only end up with 10x that number.
9 attached, 2 crawling. I don't stumble on many deer ticks, even though my dog and I put in some 30 miles a week running through the local singletrack parks!