This is the result:
As you can see, there is a significant increment in the number of perl questions handled by Stack Overflow.
The number of questions asked on this platform last year was 8.268 (the total count from the beginnings is about 22.200). For example, comparing October 2012 with October 2011, the difference is +171 (+29%)
For me, this is an incentive to keep the report up; hope it will be useful for you