I want to know the answer to the following question:
How much did Oklahoma's population decline from 1930 to 1950?
All the background I'm provided with is that "Known as the Dust Bowl, areas of Kansas, Texas, New Mexico and northwestern Oklahoma were hampered by long periods of little rainfall and abnormally high temperatures, sending thousands of farmers into poverty and forcing them to relocate to more fertile areas of the western United States.". Is that enough to answer the question?