Statistics seems to be like a Wonderbra, the basics are cryptic.
For germany as example, the numbers couldn't be compared with other countries. More than 300 licensies (ATPL&CPL) are occupied by the German Border Guard, paramilitary units. All of their helicopters are civil registered and the pilots need the civil license. Also a greater number are the military pilots who holds a civil license without civil type rating (like a frozen CPL/ATPL). That's possible in germany. Additionally we have the police units in each german country. Also more than 100 pilots, who don't work in the civil business.
Altogether i assume that Germany have not more than 600 really civil activ professional pilots. And from this pilots more than 250 work for the big EMS operators ADAC and DRF and some smaller operators on one of the more than 80 EMS bases.