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.
http://www.tickencounter.org/tick_identification/dog_tick
However, that information only helps some people feel comforted when they find a tick on their person or in their home.