How much are you all losing a month?

I aim to lose 7lbs per month and it's almost working out that way at the moment. I still have a long way to go though.

So far Ive lost 13 pounds on MFP (I lost like 20 before I started counting) and monthwise it goes like this:
October: 10 lbs
November: 10lbs
December: 10 lbs
January: 5 lbs
February: 1 lbs
March: 4lbs and counting

Now in February I dieted like I never have and excersized for like four hours each day and i gained muscle in my legs but mostly I didn't lose weight because I under ate a lot and ended up shutting down my body kinda.... So a plateau can be caused by a lot of things in my experience. Eating the same meals, doing the same workouts, ect. Your body can adapt and start thinking those are normal conditions and refuse to give up the weight and also the lighter you get the less calories you burn because your body puts less effort into anything you do.