I began a concerted effort to lose weight about 8 weeks ago and have noticed that my losses seem to be getting fewer and fewer. The first month or so I was able to lose about 4 pounds a week but in the second month I've been averaging about 2 pounds a week. I do my best to limit myself to about 1,000 calories a day and walk about two miles a day 5 or 6 times a week. I'm 5' 10", in my mid 50s and began at 228 lbs. As of this morning I weighed 206 lbs. My goal is to get to 180 lbs.

Is this fast initial weight loss, followed by slower results common?