Year	cubic meters
1961	93107.30258842089
1962	90462.48536681372
1963	87876.56917479055
1964	85351.31112848748
1965	82887.55976513443
1966	80498.40595324287
1967	78184.01023885356
1968	75939.85439940484
1969	73769.76330144369
1970	71676.05146612682
1971	69658.935742466
1972	67711.21107255844
1973	65828.99371365846
1974	64012.75161793531
1975	62259.12235465576
1976	60566.65693273966
1977	58934.29372431032
1978	57359.8049351733
1979	55841.02977725437
1980	54376.65048928538
1981	52965.53098064531
1982	51606.23833566615
1983	50296.31510141176
1984	49030.37012498865
1985	47804.74743068393
1986	46617.020523290805
1987	45470.54199570455
1988	44374.06291889055
1989	43329.28345568665
1990	42335.588583821926
1991	41398.88168744237
1992	40534.26804036055
1993	39738.32706852858
1994	38986.038697697106
1995	38264.32535816801
1996	37570.42012205121
1997	36904.0689405379
1998	36263.20760694552
1999	35642.79410501701
2000	35037.4018721092
2001	34440.01998829008
2002	33846.930927242945
2003	33260.196986974996
2004	32686.61274114412
2005	32127.786090527734
2006	31579.561256817997
2007	31041.616746194435
2008	30517.085946640487
2009	30007.93745217146
2010	29513.825766357106
2011	29033.19970011277
2012	28571.644464117948
2013	28137.14364361636
2014	27722.782700632673
2015	27315.551798226486
2016	26910.65498307895
2017	26495.866548992435
2018	25999.560875409443
2019	25507.762454926098
2020	25152.66284771467