Finding stats conveniently broken down for use is hard.
The CAA rightly breaks out Offshore Operations from On-shore as they are two very different environments and types of operation. The US NTSB data base has proven to be less than useful in a lot of ways and as always....one cannot just hang a hat on numbers alone.
I am sure there are comparisons somewhere about the accident rates of the UK and USA that if found would be interesting to consider.
Even the IHST quote combines Private Sector flying and Public Transport data which doesn't work well either.