While I hate to draw this thread farther off topic I did some looking around on the DAN website and looked at Report on Decompression Illness, Diving Fatalities and Project Dive Exploration this one was the 2003 ed based on data from 2001. It states that 1170 injured divers in 2001 worldwide were recompressed. Now they break these numbers down based on various factors age, location, gas, even time of day the incident took place. Now of those 1170 divers, 85.4% were breathing air, 12.7% were breathing nitrox and 1.2% were breathing heliox. Heres the website where I got this info, check it out.
http://www.saginawunderwaterexplorers.com/library/2003danreport.pdf#search='Report%20on%20Decompression%20Illness%2C%20Diving%20Fatalities%20and%20Project%20Dive%20Exploration'
http://www.saginawunderwaterexplorers.com/library/2003danreport.pdf#search='Report%20on%20Decompression%20Illness%2C%20Diving%20Fatalities%20and%20Project%20Dive%20Exploration'