For the first 14 years out of school not only did I only save 10% a year but I left it in a spot where it only earned about 1-2% interest.
About this time last year I found MMM, increased savings to 55% and placed it in spots that make 7-22%. (S and C funds of TSP, VTSAX, mixture of individual stocks based upon Monty Fool)
I'm aiming to retire in about eight years so a savings rate such as what you're doing is the goal, just difficult without some serious adjustments.
I'll wrap my brain around it tonight, there should be a way.