Yes, your weight loss will almost certainly slow down as you approach your ideal body composition. I followed a similar progression (26yo male, starting at just under 200lbs), from ~18% down to ~14% was relatively quick, but from there down to ~12% has taken many months.
I'm thinking of using some form of intermittent fasting to try to get down to my final goal of approx. 10% (check out leangains.com for some interesting reading, seems to work for some people). Best of luck.