Year	cubic meters
1961	1238.3856468664976
1962	1207.3040969739177
1963	1176.3896250903383
1964	1145.9915251015195
1965	1116.143170922162
1966	1086.3953141652773
1967	1056.6331736349168
1968	1027.3601950954783
1969	998.7999247666811
1970	971.1760252093067
1971	944.4948197565578
1972	918.4820197314635
1973	892.9053613439943
1974	867.7446581252739
1975	841.7825602965567
1976	813.3060442486217
1977	786.3892815882398
1978	763.3565441819944
1979	739.2835637945957
1980	714.847452973087
1981	693.359048443151
1982	672.8560037609539
1983	651.934844871015
1984	631.3939300859207
1985	611.9143659267065
1986	593.1250594513574
1987	575.3166990113347
1988	559.4056627525507
1989	544.4505723387501
1990	531.0584567021783
1991	519.5159705168741
1992	506.3721883066048
1993	492.5848295419793
1994	479.4251453715563
1995	467.83671606615184
1996	456.8747614205103
1997	446.3519490822141
1998	436.25107598946875
1999	426.553069341825
2000	417.1460070349566
2001	408.07294467635967
2002	399.26102392140905
2003	390.7478770968645
2004	382.458124161494
2005	373.7842121112593
2006	364.5740776650035
2007	355.1273038079087
2008	345.80430164681724
2009	336.9756022421253
2010	328.94477414656285
2011	321.89369440767723
2012	296.48506645694704
2013	289.8197243346148
2014	283.41670144831943
2015	277.4352900537643
2016	271.70317595277766
2017	266.1962703022424
2018	260.7308459141781
2019	255.46147552131777
2020	251.04829994947602