Year	million ton-km
1970	63.5999984741
1971	65.5999984741
1972	79.4000015259
1973	85.4000015259
1974	96
1975	91.0999984741
1976	105.4000015259
1977	117.3000030518
1978	128.8999938965
1979	124.9000015259
1980	119.8000030518
1981	125
1982	120.5
1983	116.5
1984	120.6999969482
1985	121.6999969482
1986	123.5999984741
1987	115.9000015259
1988	120.8000030518
1989	127.5999984741
1990	129.6000061035
1991	122.8000030518
1992	118.4000015259
1993	127
1994	136
1995	139.1000061035
1996	177.1000061035
1997	205.5
1998	203.3999938965
1999	201.3999938965
2000	201.042
2001	184.961
2002	184.859
2003	174.549
2004	176.585