Yes that as valid a source as possible for UK but your initial headline number is quite skewed I think. 3200 AutoGyro and yet only 217 factory built in the UK, maybe we get to 1000 for the total of EU countries. The USA has relatively few "factory built" turn key aircraft and I'd suggest that the majority of the rest are in China then I shudder to think what the loss rate is there.
Flight hours wise for the UK, using CAP780 - which references the same data you suggest - https://publicapps.caa.co.uk/docs/33/CAP780.pdf page 25. Suggests roughly 10hours per machine as a quick and dirty number. So 87hrs per machine today as an average I think there must be a flaw in that data somewhere. For example G-RARA is the instructor aircraft for Kai Maurer, who was/is one of the busiest instructors in south England. In 7 years it has 1800 hours or circa 250hrs per year - there is no way the average guy is flying anywhere near close to that and 2020 is a total bust given the virus. Sorry I'm kind of calling out the numbers but I'd be interested to see the spreadsheet etc on that calculation.
Flight hours wise for the UK, using CAP780 - which references the same data you suggest - https://publicapps.caa.co.uk/docs/33/CAP780.pdf page 25. Suggests roughly 10hours per machine as a quick and dirty number. So 87hrs per machine today as an average I think there must be a flaw in that data somewhere. For example G-RARA is the instructor aircraft for Kai Maurer, who was/is one of the busiest instructors in south England. In 7 years it has 1800 hours or circa 250hrs per year - there is no way the average guy is flying anywhere near close to that and 2020 is a total bust given the virus. Sorry I'm kind of calling out the numbers but I'd be interested to see the spreadsheet etc on that calculation.