Year	million ton-km
1970	138.5000004394
1971	150.69999783499998
1972	158.99999967230002
1973	180.20000228280003
1974	237.30000214990002
1975	259.8000010182
1976	297.3000018450001
1977	303.40000007320003
1978	322.30000092850014
1979	413.6000017303001
1980	408.2000032441002
1981	440.00000017160016
1982	459.2999982609999
1983	439.4999975339001
1984	502.59999192510014
1985	563.0000007822999
1986	542.9000103922001
1987	594.299996421
1988	616.6999937592
1989	662.1000006348002
1990	649.3000053538001
1991	622.7000031769
1992	611.8000005186002
1993	578.1000026763
1994	738.1000059917
1995	764.3999997300999
1996	749.5000017655
1997	863.5999927668998
1998	720.100000754
1999	759.3000020236999
2000	878.7629999999999
2001	733.3230000953673
2002	636.542
2003	699.9939999999999
2004	818.536
2005	842.8280000000001
2006	900.4470000000001
2009	865.1719999999998
2010	1173.3490908123144
2011	1303.2434587091052
2012	1548.1334056808773
2013	1724.6057977497135
2014	1809.8167534599172
2015	1862.6091158674005
2016	2129.9238055158366
2017	2707.365280667227
2018	2748.694515225184
2019	3185.800438451845
2020	3382.8315314101637
2021	4410.113571964