If you're going to try and work out whether fiscal stimulus shortened the Great Depression then the two most important questions are, was there a fiscal stimulus and if so, did it shorten the Great Depression?
If you're going to talk about the unemployment rate worth making sure that you know what it actually is.
Something to ponder about the US: "the important fact that the origins of the United States rest on the economic consequences of unjust government policy. We are a country founded on a tax revolt...."