but you said that you have much more traffic now and from the stats its look like you barely have much before that month, its looked like you barely have traffic before that month and guessed that the traffic that you had in january(very little) was pretty much the same in the last year. if it was the case its quite reasonable to assume that most of the money you made after your site had gained much more traffic. i don't even know how much and when you stopped to advertise or why your site seems inactive before that month... you didn't gave me much details

anyway i am looking for quite average example(not some extreme case) of some site with specific traffic and his income from adds from a specific service. i don't looking to know exactly how much i can earn but to get more specific estimation than anything from few fractions of a dollar per month and above.