Here I am at 18 years old and 150 lbs below. Had been training since I was around 13. Of course at that age training doesnt do much as you can see by my pic lol. .....
good build, you certainly leaned out from the chubby 220 when you were 20 to the pic at 26 weighing 175. about 5 pounds in 6 years, possibly slightly higher bf%.
this is what i mean, and again it somewhat follows my own personal experience. work out natural and make good gains late teens early 20's (even someone with bad genetics can do this). hit a wall in which muscle/strength gains come to near complete halt. then lean out, which is the idea, show what you have, but in a way it fools us into thinking we are still making gains/progress, when in fact our muscluar gains have essentially stopped.
looks like the rough pound per year of lean weight is what the natural can expect, once the intiital growth spurt is passed.