Year	cubic meters
1961	1500.988943781103
1962	1456.9984239003306
1963	1413.6082588655258
1964	1370.788218601896
1965	1328.5023929621411
1966	1286.8993394626455
1967	1246.1329168840527
1968	1206.2140657887282
1969	1167.0062526139827
1970	1128.6240550424193
1971	1090.7657169215202
1972	1053.6978115234235
1973	1018.4040985196015
1974	984.416488230826
1975	951.2978706773769
1976	919.2293579069513
1977	888.2453579776999
1978	858.220669809224
1979	829.2302982520006
1980	801.4425066136987
1981	774.9112171440958
1982	749.8879689244407
1983	725.1312368581401
1984	700.3734997993743
1985	676.6008982512542
1986	653.8548880374351
1987	632.207459782094
1988	611.7807073255507
1989	592.6493695372407
1990	574.7443225866137
1991	557.9598821211957
1992	542.0933346082509
1993	526.8499954938516
1994	512.259684344031
1995	498.2726037398391
1996	484.8771956040973
1997	472.192921661261
1998	460.11294314740735
1999	448.5195803763502
2000	437.34064997945137
2001	426.35235355824875
2002	415.5203492235298
2003	404.9659776339766
2004	394.38162128559225
2005	383.7801342337207
2006	367.02329645895077
2007	344.4910533519168
2008	332.12165431789117
2009	326.7479779834537
2010	319.28281522921725
2011	313.7602293775568
2012	315.49736598185484
2013	331.7854200590896
2014	355.31673806879076
2015	371.3581826734436
2016	376.0759981464072
2017	375.69719564589496
2018	368.894077589721
2019	354.8567484802533
2020	343.3369783601904