Year	cubic meters
1961	3168.607550547245
1962	3096.1993440027204
1963	3025.5247643501725
1964	2956.6966079363597
1965	2891.338773953107
1966	2829.7864820226946
1967	2770.1835656009325
1968	2710.748973961361
1969	2651.6799923977837
1970	2593.715920314956
1971	2536.845763661786
1972	2480.963950507734
1973	2425.7370377616953
1974	2371.572808931066
1975	2319.075917081578
1976	2268.4080560751977
1977	2218.8612697163853
1978	2170.2986198821927
1979	2122.5738454339935
1980	2075.1163860812017
1981	2028.4223265847536
1982	1983.078101078906
1983	1938.788593346743
1984	1895.4111697099306
1985	1853.2709650662728
1986	1812.3048891951464
1987	1772.6755125749169
1988	1734.3751013705366
1989	1697.1578543644503
1990	1661.2055873282823
1991	1626.6532539843927
1992	1593.2584251315454
1993	1560.9628924608717
1994	1529.734681230026
1995	1499.5657963680762
1996	1470.5864136621797
1997	1442.6311245190893
1998	1415.6560135869142
1999	1389.7164103366783
2000	1364.622542785836
2001	1340.1658845654122
2002	1316.564539119525
2003	1294.0580185793674
2004	1272.590927882507
2005	1252.3397870862832
2006	1233.3950270815847
2007	1215.440830188989
2008	1198.274875979669
2009	1181.719959240305
2010	1165.552253085856
2011	1149.7897859451703
2012	1134.5739549062482
2013	1119.9474023130972
2014	1106.1417950208502
2015	1093.0808169490995
2016	1080.2037542175196
2017	1067.7925069145103
2018	1056.2428839014067
2019	1045.4684419819782
2020	1035.5294545765316