I looked all over to get the various accepted value of the Planck constant since 1900. But there is never any record about the history of this mysterious number.
I think what you are asking, in a rather poor way, is the Planck constant time-dependant over long time scales? The way you are asking this, by looking at scientific records of this measured value, is not a good approach. If you want to ask the question "are physical constants, actually constant in time?" -- which is a very good question to ask. In fact there are several experiments which want test if physical constants are actually constant; e.g. measuring the fine-structure constant $\alpha$ with atomic clocks.
However you can't compare measurements of the Planck constant through history, as they are recorded at different fractional precision. So you can't use these values to make any statement that about the Plank constant's constant-ness in time.