Year	Thousands Of Dollars
1917	25044.0
1918	16614.0
1919	21862.0
1920	28209.0
1921	51507.0
1922	52529.0
1923	42809.0
1924	42011.0
1925	43346.0
1926	53621.0
1927	59417.0
1928	71369.0
1929	70066.0
1930	82488.0
1931	111048.
1932	141060.
1933	91445.0
1934	66482.0
1935	55737.0
1936	39233.0
1937	37816.0
1938	41342.0
1939	38252.0
1940	34498.0