Chiropractor.com - The pinnacle domain for the chiropractic market: The average gross income for chiropractors in 1991 was over $234,000 and in 2005, the mean salary for chiropractors was $104,363 and there are many chiropractors personally making over a million dollars a year. There are about 70,000 chiropractors that are licensed in the US, 10,000 in Japan, 6,000 in Canada, 2,500 in Australia and 16,000 in the UK. "The New England Journal of Medicine stunned the health care world in 1998 when it reported that alternative medicine almost equaled conventional medicine in total revenues." In the U.S. treatment for back pain is a 100 billion dollar business. 1% of the nation’s GDP is spent on back pain treatment. The U.S. chiropractic market share alone is estimated to be 16.4 billion and growing. Markets of similar size for comparison sake: 1) In 2006 sales of nutritional supplements in the U.S were approximately $4.7 billion through all channels, including mass-market, health and natural stores, and direct and internet sales, This includes all vitamins, nutritional supplements both herbal and non-herbal. 2) The U.S. market for over the counter drugs, which is by far the largest in the world, had sales in 2003 estimated at $17.5 billion.