I'm not far off my goal either (10kg to go), and the rate of loss has definitely slowed down to a crawl. Some weeks I lose nothing, then the next I'll be down half a kilo, but I was both warned of this by my dietician and my own research so it's fine. It's good not to get hung up on the number on the scale, because what actually matters more to me is how my clothes fit, and despite the slow scale movement, my clothes continue to loosen. I'm now a small size AU16/US12 to a large AU14/US10. My goal is AU12/US8. I'm so close I can taste it! So another 10kg will actually put me below that, so I'm honestly fine to call "Maintenance" once I'm a comfortable AU12/US8. If that means my weight is above 75kg, that's fine. That's where I'll settle!
So don't put too much stock in the scale. It's easy to get hung up on it, and it's freeing to realise it's not actually THE ONE measure of success. Be patient, enjoy being so close, and know you'll get there. My dietician said I should hit goal by the end of this year, but I'm way ahead of that! I keep that in mind any time I feel a little disappointment at the crawling scale number.
And as I've told friends and family, if I stay where I am now, I'll still be happy. I can buy clothes almost anywhere, and blend in with the lean crowd, which is all I've ever wanted! Anything beyond this is a bonus.