On average, someone arrested for drunken driving has driven drunk 80 times
before, without being caught.

Each day, almost 300,000 drunk drivers take to the roads in the US and on
average, just over 3,500 are arrested for driving under the influence,
according to 2012 FBI statistics. So, a drunken driver has less than a 1.5%
chance of being caught. On average, a drunk driver will drive under the
influence about 80 times before their first arrest.