Year	cubic meters
1961	924.5266245888523
1962	912.1526803255683
1963	899.996538474852
1964	886.4039274512478
1965	871.8395815170009
1966	857.8734636641095
1967	843.9229433435577
1968	829.9020077244726
1969	815.7886479871984
1970	805.9891191468915
1971	802.8532168166869
1972	803.7715433959347
1973	806.6642880412019
1974	809.7418169360616
1975	812.0559069258999
1976	812.6269729645257
1977	811.0173588907778
1978	808.344603522517
1979	804.8414307604204
1980	801.3684908073786
1981	799.0657077878174
1982	797.1669911545123
1983	795.0097847358121
1984	795.5692910253664
1985	799.4096667076619
1986	803.5603906539744
1987	808.0431370720868
1988	812.7285799131006
1989	817.1475265572946
1990	821.121778676099
1991	817.1732092906308
1992	804.2190568984981
1993	789.8654190843637
1994	775.2862595419847
1995	760.2561478405802
1996	745.0070202584601
1997	730.1524895391614
1998	716.529791104007
1999	704.4066051665515
2000	692.8252614749183
2001	682.280390999147
2002	673.6187576915603
2003	666.0262568043548
2004	658.719803397474
2005	651.0661207727653
2006	642.8085790221892
2007	634.0226297307843
2008	624.6171217162556
2009	615.1371045969669
2010	606.8031973860785
2011	599.5687716911298
2012	593.1062800830349
2013	587.5905397923093
2014	582.7244609798736
2015	578.1567916745422
2016	574.179585707345
2017	570.6822945818105
2018	567.5245017789711
2019	564.4994952071821
2020	561.1672278338945