I don't know the acutal percentage of men who are circumcised, but the circumcision rate varies. Here is an article I found:
In the "who knew?" department comes this tidbit from the National Center for Health Statistics:
Newborn boys in the Midwest are more than twice as likely to be circumcised as newborn boys in the West.
In 1999, the most recent year for which information is available, the Midwest led the country in circumcisions, with 81.4% of baby boys undergoing the procedure, in which the foreskin is removed from the penis.
But only 36.7% of baby boys born that year in the West were circumcised, says a new report from the health statistics center, or NCHS, part of the Centers for Disease Control and Prevention.
The NCHS has been collecting circumcision data since 1979, but this is the first time it has published the breakdown by region and race, says statistician Abigail Moss, who wrote the new report.
From 1979 to 1999, the proportion of circumcised newborns nationwide and in the Northeast held steady at around 65%, according to the new report. ...