Year	cubic meters
1961	2562.023852442066
1962	2512.8379093906547
1963	2462.17483903532
1964	2410.368717546107
1965	2357.6644302535497
1966	2304.382606520086
1967	2250.6518852424756
1968	2196.495334800801
1969	2142.005804835731
1970	2087.393188836025
1971	2032.511472801367
1972	1977.275455656067
1973	1921.5011865269823
1974	1855.1007319697458
1975	1778.4688399555891
1976	1698.8621264171848
1977	1616.3967284130217
1978	1533.8263489454944
1979	1453.2605457408565
1980	1375.972763601982
1981	1301.570065376005
1982	1229.9031626959827
1983	1162.1864379483757
1984	1099.50004162393
1985	1034.5166479591571
1986	969.9011947797147
1987	913.0329585333038
1988	862.3700516128475
1989	816.880008495552
1990	775.8278637468939
1991	738.7133829010013
1992	705.2090264740506
1993	675.7187233935753
1994	656.1449142910706
1995	644.3678567220454
1996	633.4962021902678
1997	623.444728062316
1998	614.1086191460644
1999	605.3792268442445
2000	597.2051651421582
2001	589.5598220034674
2002	582.4453468649255
2003	575.7525908866589
2004	567.0644894090581
2005	556.6175464934685
2006	546.7363937814202
2007	537.2836473884176
2008	528.0970250031309
2009	518.9919545125794
2010	485.7882643271103
2011	436.5627543367832
2012	395.9747469933495
2013	366.8109456386178
2014	349.1910117235894
2015	333.98731229913045
2016	318.3214455431587
2017	308.24416636906426
2018	304.27129524160983
2019	304.16479822576326
2020	308.13934677539874