Year	million ton-km
1970	57.7000007629
1971	64.8000030518
1972	78.3000030518
1973	86.8000030518
1974	88.1999969482
1975	68.6999969482
1976	74.9000015259
1977	85.8000030518
1978	85.6999969482
1979	98.4000015259
1980	89.3000030518
1981	83.9000015259
1982	75.8000030518
1983	84.9000015259
1984	98.0999984741
1985	81.5
1986	75
1987	80.8000030518
1988	95.8000030518
1989	117.5
1990	128.3000030518
1991	115.4000015259
1992	109.5
1993	97.4000015259
1994	101.1999969482
1995	107
1996	102.0999984741
1997	122.0999984741
1998	129.6000061035
1999	138
2000	167.595
2001	158.778
2002	116.063
2003	121.788
2004	124.11
2005	106.997
2006	130.503
2007	125.283
2008	122.241
2009	120.852
2010	138.475121701
2011	123.452121701029
2012	123.110099893906
2013	118.253832
2014	126.164748
2015	138.58
2016	118.207
2017	154.38504
2018	168.7117
2019	174.5404
2020	131.775022
2021	86.36447