Year	cubic meters
1961	132551.2992066573
1962	128510.20071436095
1963	124629.91596748024
1964	120914.86725238693
1965	117368.23322890022
1966	114026.55845998121
1967	110887.32033733939
1968	107938.08912747428
1969	105186.94736396115
1970	102605.7851294225
1971	100208.29777963173
1972	97953.90503859817
1973	95774.67153306182
1974	93676.83135257421
1975	91652.05325595308
1976	89700.15558899715
1977	87751.8611372003
1978	85787.61913080704
1979	83856.79323882029
1980	81944.68294570697
1981	80079.19963509271
1982	78269.8345430432
1983	76491.50682170514
1984	74767.24903091884
1985	73142.63734959725
1986	71595.21925510198
1987	70091.05759661586
1988	68625.22745903625
1989	67192.68672918124
1990	65794.73459922402
1991	64467.40546012777
1992	63201.55382124992
1993	61967.829596268755
1994	60772.68689024915
1995	59632.860080098195
1996	58554.44552038428
1997	57519.122225479994
1998	56530.059997764096
1999	55591.50357601094
2000	54698.26892091536
2001	53843.233355192766
2002	53023.12129440686
2003	52243.56647270462
2004	51502.741962763015
2005	50804.174421507436
2006	50148.563658633466
2007	49530.57713028472
2008	48955.487320152206
2009	48404.65806712596
2010	47862.2552409058
2011	47341.69329517365
2012	46852.04802533689
2013	46390.485041177235
2014	45953.17784648926
2015	45522.3340847808
2016	45038.466945177264
2017	44362.47922021144
2018	43529.47009049523
2019	42739.80607804277
2020	42116.08323488903