This may belong in Private Flying, but then a lot of people earn a living in GA...
Here are 2 charts taken from a presentation given at an EASA workshop last week by a GAMA representative. I cannot vouch for the figures, nor am I sure of the exact definitions, but I assume (perhaps wrongly) that they are global totals. (The charts are published by EASA and are in the public domain.)
The charts tell 2 sides of the same story....and it's an ominous one;