Year	Million Miles
1881	0.200000E-01
1882	0.300000E-01
1883	0.300000E-01
1884	0.200000E-01
1885	0.200000E-01
1886	0.200000E-01
1887	0.300000E-01
1888	0.400000E-01
1889	0.400000E-01
1890	0.500000E-01
1891	0.500000E-01
1892	0.600000E-01
1893	0.700000E-01
1894	0.900000E-01
1895	0.120000
1896	0.160000
1897	0.220000
1898	0.340000
1899	0.600000
1900	0.770000
1901	0.780000
1902	1.32000
1903	0.950000
1904	1.08000
1905	1.54000
1906	2.09000
1907	2.44000
1908	1.50000
1909	0.920000
1910	1.52000
1911	1.39000
1912	1.92000
1913	1.99000
1914	1.48000
1915	1.07000
1916	1.31000
1917	2.73000
1918	1.05000
1919	0.530000
1920	1.59000
1921	2.00000
1922	3.27000
1923	4.13000
1924	5.10000
1925	5.70000
1926	5.76000
1927	5.88000
1928	5.29000
1929	7.33000
1930	6.65000
1931	2.99000
1932	1.58000
1933	-0.680000
1934	-0.200000
1935	0.400000
1936	0.900000
1937	2.73000
1938	2.02000
1939	2.30000
1940	4.10000
1941	6.30000
1942	2.75000
1943	-0.300000
1944	1.00000
1945	1.70000
1946	5.90000
1947	8.90000
1948	12.1000
1949	9.70000
1950	9.40000
1951	8.40000
1952	10.9000
1953	12.2000
1954	13.8000
1955	16.6000
1956	20.5000