According to most estimates, there are approximately 1.2 million scuba divers world wide.
Average age is 29
PADI, the world’s largest scuba certification agency, has barely grown over the last 6 years. In 2007 they had 133,562 members and in 2012 they had 135,710 members, less than a 2% increase.
Between 1997 and 2004, the Divers Alert Network reported an annual fatality rate between 11 and 18 deaths per 100,000 members per year.