21.4% live in Michigan
14.3% live in Illinois
7.1% live in New York, New Jersey, Pennsylvania, Florida, Ohio, Wisconsin, Louisiana, Montana and Washington
If you don't like people
called rocko
you should probably go to
New Hampshire (None live there).
Fun fact: Montana
is the state with the most
first name rocko per capita.
Check out the popularity
of the first name rocko
for each state in the map below.