Table 1.

Geographic Study Location Pre and Post 2003 (%, n)

Country	Pre -2003 (n=136)	2003–2010 (n=426)	Change in proportional contribution (%)
Australia	12%, 16	6%, 26	−6%
Canada	3%, 4	8%, 33	5%
Other*	8%, 11	14%, 61	6%
United States	62%, 84	64%, 274	2%
United Kingdom	15%, 21	8%, 32	−7%

^*Austria, Belgium, Chile, Egypt, Germany, Greece, India, Ireland, Israel, Italy, Japan, Kuwait, Mexico, New Zealand, Nigeria, Norway, Papa New Guinea, Saudi Arabia, Singapore, South Africa, Spain, Sweden, Switzerland, Thailand and The Netherlands