The work of mathematicians goes through peer-review which contributes to the acceptance of the correctness of our work. Peer-reviewers are of course peers, that is other mathematicians, and most of us consider this work important.
At least two of my colleagues complain about how much they have to referee and (they claim) give my name as an alternative peer-reviewer (instead of doing it themselves). As it is the end of the year, here the number of referee requests which I accepted in my life by year of acceptance. Note that 2015 might include 2013 and 2014. I know that many colleagues review far more papers than I do, but for certain not all of them and, hence, I hope that the chart below discourages some of my colleagues from recommending me as an alternative referee.
[This year I was not even a good referee as I lost track of some of my commitments which I agreed to during my move to China.]
Ratio Bound – A Combinatorics Blog 