Year	Thousands Of Dollars
1917	30214.0
1918	20362.0
1919	20470.0
1920	29199.0
1921	45939.0
1922	59615.0
1923	59141.0
1924	66650.0
1925	72226.0
1926	103772.
1927	117065.
1928	126709.
1929	154215.
1930	179230.
1931	241288.
1932	480481.
1933	378023.
1934	283406.
1935	268518.
1936	253998.
1937	219208.
1938	119424.
1939	104309.
1940	96629.0