I've been recording my weight every day (almost) for 1033 days so far. I'd already lost ~20kg before that, and lost the next 10kg in 35 days, by comparison. At my lowest weight, day 559, I'd lost 27kg from when I started recording (about 80% of the total I want to lose).
Unfortunately, at day 1033 I've gained about 12kg since my lowest point, so overall loss of 15kg (58% of total to lose). So lost a bit of ground and seem to have really hit a plateau in the last year.
This has been with the assistance of a lapband as of four years ago.
Not to be discouraging, but it seems you make the big losses early and it gets harder. Best of luck.