Yoda's Slow Growth

Considering the fact that midichlorian counts are the natural ceilings of a force user It's always bugged me that Yoda who had the highest midichlorian count ever recorded by the Jedi before Anakin's discovery, took 100 years to be promoted to Jedi master.  Every other jedi master present in the PT has a lower midichlorian count than him and they  still manage to have a power growth rate far surpassing Yoda's. Is there an explanation for Yoda's slow growth?

Yoda was probably limited by his body. You can’t keep growing more powerful if you’re unable to harness power beyond the capabilities of your body’s potential.