Year	Billions Of Metric Ton-Kilometers
1851	0.460000
1853	0.810000
1854	1.14000
1855	1.52000
1856	1.87000
1857	2.14000
1858	2.39000
1859	2.73000
1860	3.12000
1861	3.81000
1862	3.88000
1863	4.07000
1864	4.63000
1865	5.17000
1866	5.83000
1867	5.85000
1868	6.31000
1869	6.27000
1870	5.06000
1871	5.51000
1872	7.73000
1873	8.25000
1874	7.93000
1875	8.14000
1876	8.33000
1877	8.19000
1878	8.40000
1879	9.00000
1880	10.3500
1881	10.7500
1882	10.8400
1883	11.0600
1884	10.4800
1885	9.79000
1886	9.31000
1887	9.92000
1888	10.4100
1889	11.0500
1890	11.7600
1891	12.2900
1892	12.1200
1893	12.2700
1894	12.4800
1895	12.9000
1896	13.2200
1897	13.7900
1898	14.8600
1899	15.7200
1900	16.5600
1901	16.0200
1902	16.1700
1903	16.5800
1904	16.5500
1905	17.6800
1906	18.4800
1907	19.8900
1908	20.6000
1909	21.3300
1910	21.9800
1911	23.2900
1912	24.8800
1913	25.8900
1920	26.5400
1921	27.0600
1922	29.7500
1923	34.7600
1924	38.8700
1925	38.7700
1926	42.4200
1927	38.3400
1928	40.9200
1929	43.7700
1930	42.6800
1931	38.6100
1932	33.0900
1933	32.2800
1934	30.8000
1935	28.0800