Year	cubic meters
1961	2572.2369887678983
1962	2475.017271316176
1963	2380.076346410339
1964	2287.9534168263167
1965	2198.1039601232083
1966	2111.683577987688
1967	2029.1992956031663
1968	1950.2769817287312
1969	1875.0762598949902
1970	1804.2223509679652
1971	1739.7213773180843
1972	1679.798988923308
1973	1622.2055647920265
1974	1567.7128107659307
1975	1516.2715717099763
1976	1467.8490013095766
1977	1420.0115713793168
1978	1372.0036881049866
1979	1325.1720659106015
1980	1278.7941823389997
1981	1233.1732908724564
1982	1188.8700399064041
1983	1145.5792732279065
1984	1103.8130287904298
1985	1064.1491194731525
1986	1026.7409471581075
1987	991.2798975045317
1988	957.1757710420758
1989	924.6106015851577
1990	893.694827566332
1991	865.4484747724905
1992	839.5616709353848
1993	815.2228492393025
1994	792.0793897728546
1995	770.136645679885
1996	749.5726349643551
1997	729.7915433307206
1998	710.4278069268634
1999	690.8029663413096
2000	670.9537260394159
2001	650.9363751202307
2002	631.4860211417248
2003	613.0223357501418
2004	594.9671641358622
2005	577.5184617586525
2006	560.591961279182
2007	544.2099180128041
2008	528.2378203223296
2009	512.8275766662363
2010	498.5801905419338
2011	485.51495451733433
2012	473.40465262092596
2013	462.13229896664535
2014	451.6508525957149
2015	441.8216130083211
2016	432.1984053757965
2017	422.8965854206055
2018	414.38700431106616
2019	406.2691051972024
2020	398.1858115815517