Year	cubic meters
1962	16996.87993975056
1963	16727.174990888117
1964	16458.440184639054
1965	16187.925758211702
1966	15914.46676365806
1967	15639.45674067249
1968	15365.220920641392
1969	15094.388158209033
1970	14827.95778499371
1971	14566.816738274289
1972	14311.49762897769
1973	14065.937829068462
1974	13870.199247987006
1975	13688.792020342395
1976	13474.944640367425
1977	13264.805234229172
1978	13088.06683756299
1979	12946.202736116518
1980	12791.4870823887
1981	12653.061224489795
1982	12539.840515820197
1983	12401.64731315254
1984	12236.119117092883
1985	12043.529699798712
1986	11832.913215700397
1987	11607.00913583945
1988	11367.252902350938
1989	11105.32825944426
1990	10836.215516036016
1991	10632.17089127748
1992	10482.260544465073
1993	10331.007232333852
1994	10178.227390148862
1995	10027.757908074207
1996	9882.480881639998
1997	9741.018164657002
1998	9603.593134979876
1999	9479.03938041814
2000	9352.65722482809
2001	9199.31780591511
2002	9031.055176833886
2003	8864.588155442683
2004	8684.033323854717
2005	8475.07461470134
2006	8259.900820862205
2007	8058.9623705808135
2008	7875.744432812183
2009	7709.705876832403
2010	7547.180211780399
2011	7381.111542387257
2012	7220.860772311273
2013	7072.415856330523
2014	6933.484128524768
2015	6812.830845247148
2016	6708.521087539871
2017	6607.761203634067
2018	6510.308318375077
2019	6415.773352555922
2020	6319.255074057977