Honestly, unless someone has records of several clutches where they measured length, girth and weight over a period of several years, I don't think you're going to get the specific information you're looking for...
Since I have a female, this is what I know, and/or remember from all the care sheets I read before getting my blood.
Females can grow to over 7 feet, but its rare, and the average is about 6 feet. The often weigh over 30 pounds, and will get as big around as my calf. I'm not sure exactly how many inches around it is, or how it would compare in girth to you.
I couldn't tell you how long it takes to get that big, because I don't really care... I'm going to keep my snake no matter how big she gets, and no matter how fast she outgrows her cage. My baby blood has probably grown 4-6 inches since I got her a little over two months ago, and is probably 15% thicker than she was when I got her. I have no idea how much she's changed, because its way too stressful to take measurements. The less she's stressed, the more she eats, and the faster she grows.... exactly the way I like it.
People who have more experience... please correct me if any of this information is wrong. I just thought I'd type up what I knew off the top of my head since this poor guy didn't get the answers he wanted earlier.