Seriously the length of time someone has been playing is not relevant.
My grade has been between 1700 and 2170 at one time or other over the past 42 years.
Edit: Correction over the past 40 years. For the first 2 years it was probably less than 1700 but I don't really know as I only got my first grading after playing for 6 years and that was 1850 when I won (on my first and only attempt) the 1st national Scholars Chamionship of Rhodesia (now Zimbabwe). At 13 after playing 2 years I won my High School chess championship but that was graded so don't really know what grade I had then.