One wonders what the statistic might be for US pilots:


http://www.msnbc.msn.com/id/25370855/
Pilots in India often fail alcohol tests

updated 10:01 a.m. PT, Wed., June. 25, 2008
NEW DELHI - Around 50 pilots each year in India are being grounded
because they had consumed alcohol before taking a flight, the
country's civil aviation authorities said Tuesday.

The Director General of Civil Aviation (DGCA), a body controlling
airline operations in India, said dozens of pilots are found to have
consumed alcohol during routine pre-medical tests every year. ...

The country has about 4,500-5,000 commercial pilots, and another 2,500
are undergoing training.

Civil aviation rules specify that pilots and cabin crew cannot consume
alcohol 12 hours before taking a flight. ...

"We have strict guidelines for alcohol intake and any operating crew
is pulled up immediately, and the airlines too can punish crew
members," he said by telephone from Mumbai.

A pilot can be grounded for three months and he can lose his license
if he repeats the mistake again, Gohain added. ...