I think Gabriel is on to something. Rather than number of articles produced in a year vs readership, you may want to (if possible) look at number of articles produced and available versus readership. If I send a link to an article you wrote in 2010 to a bunch of coworkers because I think it is relevant, am I generating pageviews for you in 2010 or 2013? Furthermore, if I am going to read just one website tonight before I go to bed, and I happen to want to read about engineering management, software design, and/or industry trends, are you more likely to be the lucky writer if you have more content up? Absolutely.

I would hypothesize that as long as you keep doing what you are doing at the rate you are doing it, you will continue to grow as long as 1) someone else doesn't start doing the same thing but more frequently or better than you and 2) people still care about these same topics.

Good luck and happy new year.