>>2189Hard to say, many correlations could be made.
The 1995 to 2010 period for example also correlates with the internet being very affordable and also relatively organic, since the tools for manipulating online communities didn't exist yet or were relatively rudimentary. Weather or not that is actually the cause, is of course entirely speculative.
It has to be pointed out that OP may be trying to collect data on the age of the user-base.