Survey

YAMAHA conducted a street survey with males and females from age 14 to 50; it was conducted in late April 2011 in different districts of Tokyo. According to the survey, 68.4% of peoples up to 20 years old, 61.1% in their twenties, 41.5% in their thirties, and 35.2% in their forties know about Vocaloid. About 1/4 of the girls in their teens often listen to Vocaloid music; 8.4% of them only listen to Vocaloid music, and 15.6% of them listen to it a lot (it constitutes more than 30% of what they listen to).
                                          

General statistics about VOCALOID and DTM in Japan as estimated by YAMAHA are:

• 5 million casual Vocaloid listeners
• 100,000 core Vocaloid listeners
• 10,000 Vocaloid producers (100,000 general DTM producers, 10,000 on a professional level)
• 8,000 creators of derivative works (manga, cosplay, goodies)

Source: vocaloidism.com
infogr.am