Year	Dollars
1920	0.615000
1921	0.521000
1922	0.473000
1923	0.541000
1924	0.540000
1925	0.540000
1926	0.530000
1927	0.531000
1928	0.536000
1929	0.562000
1930	0.524000
1931	0.475000
1932	0.369000
1933	0.413000