Year	Thousands Of Short Tons
1907	12538.0
1908	10969.0
1909	12109.0
1910	14441.0
1911	8009.00
1912	15225.0
1913	15258.0
1914	14943.0
1915	9235.00
1916	9054.00
1917	8867.00
1918	8655.00
1919	5287.00
1920	7224.00
1921	8297.00
1922	10258.0
1923	7975.00
1924	10765.0
1925	11207.0
1926	11747.0
1927	11746.0
1928	12658.0
1929	13159.0
1930	17498.0
1931	10384.0
1932	7474.00
1933	9131.00
1934	11176.0