My whole life? haha no...
I've yoyo-ed a TON previously, unsuccessfully. I started being successful in 2005. So I'll start there.
2005- 267+ lbs to 180ish lbs. That took me almost 2 years. I kept that weight off until 2007 when I got pregnant with my daughter.
2008- My post pregnancy weight settled in the 230s this time. (pregnancy and nursing are awful to me). It took me about 2 years to get back into the 180's AGAIN. I maintained for about a year and now I'm back to get these last few off.
So yeah, in reality... a lifetime
. It doesn't matter. The trend is down/maintan... so I'll take it!!! I'm in no insane hurry.