Doing a comparison of keyword search frequencies and need some help determining which test to use to compare means:

I was given a list of 200 keywords, and the average number of times they were searched in every month of 2014 and 2015. Took the yearly average for all 200 and want to compare the annual means.

Which test do I use for this? Unclear, as I don't have a base-size (presumably all internet users?). My first thought was that my 'n' would be the number of keywords (200) and I would use a paired t-test, but that doesn't seem right... Any help would be much appreciated!

Thanks--