The Fatahzadeh, et al. Study, 2000

Prevalence rates (per 1,000 persons) for oral mucosal lesions
found in 1,125 adults attending a community oral screening
and oral health education program in New York City
and Newark, New Jersey.

[63% women; mean age 60 +- 27 years (no significant difference between
 genders); 22% used tobacco regularly; 41% used alcohol regularly]

* includes: mucocele, papilloma, hemangioma, herpes simplex virus lesions, lichen planus, etc.

Reference

Fatahzadeh M, Kano G, Sirois D. Epidemiologic study of oral mucosal lesions in 1125 community residents. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000; 89:442. (abstract)