Year	cubic meters
1961	75149.3349104649
1962	72951.7660860964
1963	70837.27316915961
1964	68816.04337435949
1965	66896.11605120724
1966	65084.46384870752
1967	63376.52953393296
1968	61761.363387169906
1969	60223.160159318926
1970	58742.42339735317
1971	57317.12828976624
1972	55941.83409013745
1973	54607.59202377646
1974	53321.46678736665
1975	52078.870095509665
1976	50868.70192274169
1977	49684.0939440645
1978	48523.80737764505
1979	47393.2843841606
1980	46292.214036389705
1981	45227.19294363114
1982	44204.08230673627
1983	43221.20683901349
1984	42281.36376630528
1985	41386.66757126132
1986	40538.98590448504
1987	39735.72297789742
1988	38973.11641864695
1989	38249.11846119546
1990	37563.09136239601
1991	36918.81600620126
1992	36311.554290391985
1993	35729.41641479826
1994	35165.75600548618
1995	34620.6075555192
1996	34094.78514087952
1997	33587.12905616127
1998	33097.55897521959
1999	32630.822260810353
2000	32187.867522219924
2001	31765.55888549316
2002	31366.93252095139
2003	30997.220500428193
2004	30646.04477117005
2005	30305.571705857426
2006	29980.825935158948
2007	29673.006767662762
2008	29381.49127048698
2009	29102.772624386707
2010	28830.656090394357
2011	28564.17677230171
2012	28308.155368538155
2013	28063.406761651062
2014	27823.698703895345
2015	27589.30514548826
2016	27366.39054731128
2017	27150.43325588034
2018	26935.774835231663
2019	26730.20620675483
2020	26552.993151325925