Year	cubic meters
1961	14636.226830210751
1962	14460.092347630458
1963	14108.952409068319
1964	13780.640397713707
1965	13457.603255682981
1966	13106.44844903794
1967	12782.975274607217
1968	12466.22416534487
1969	12148.681996428442
1970	11838.89174459886
1971	11538.709349609102
1972	11268.680925285425
1973	11019.306699292802
1974	10792.985740404725
1975	10593.662355461602
1976	10411.491089030815
1977	10246.076339136278
1978	10090.296805189979
1979	9938.980521208441
1980	9792.80783272324
1981	9646.099543001028
1982	9489.856579788317
1983	9338.801217936054
1984	9199.359177631477
1985	9059.858582183344
1986	8915.671424770902
1987	8767.89710127509
1988	8623.720971745493
1989	8487.433992950258
1990	8361.487112020315
1991	8244.941236143297
1992	9706.683267760975
1993	9578.347379816467
1994	9475.362002682203
1995	9377.905793225924
1996	9284.376800241213
1997	9194.913245100746
1998	9110.199297963534
1999	9033.154454865007
2000	8964.749744793517
2001	8900.594977469042
2002	8840.853565158255
2003	8783.402231178925
2004	8727.50771222118
2005	8671.63651885002
2006	8589.805758010843
2007	8535.273876998157
2008	8480.249514738158
2009	8426.32494921469
2010	8376.549573084969
2011	8323.947862074052
2012	8263.819086721815
2013	8203.68355459668
2014	8146.40148292772
2015	8094.159982028904
2016	8044.08752089182
2017	7993.41753125888
2018	7950.047175383535
2019	7913.494437450379
2020	7886.5341493704755