Cover Letter Help - include or don't include percentages?

[Mags]

I'm working on a cover letter and I'm debating whether or not I should quantify the following information:

- in two months I raised Facebook likes for my company to 166 (an increase of 1,975%)
- I increased Facebook group membership from 50 to 300 (an increase of 600%)

Obviously the actual numerical increases are a bit on the small side (it's a small company targeting a niche market, so it's fairly good for what the company is), but I feel like if I put the huge percentages that might call for some awkward questions in the interview itself (provided I get it). Any thoughts on how to present (or maybe avoid presenting) this information?

[MM]

Do you have average numbers for the niche market, or an idea of some of your competitors' stats? That would probably be the best way to put the increases into context. If not, I think it's okay if you just stick with the raw numbers, or say something like "Thanks to my management, our Facebook group now has six times the membership it did when I started."