Year	cubic meters
1962	76113.73006433743
1963	74566.7054802795
1964	73065.09226407298
1965	71607.4627627115
1966	70187.83236688496
1967	68808.27894515051
1968	67475.28240997861
1969	66171.15260000394
1970	64872.29545541407
1971	63565.750540509354
1972	62262.75627227684
1973	60976.74575006699
1974	59771.552065651755
1975	58530.12747697592
1976	57174.434307970216
1977	55788.173080432476
1978	54448.14166078577
1979	53127.850191911406
1980	51870.12857800227
1981	50749.5695984959
1982	49686.58954522425
1983	48660.54962075838
1984	47650.44302023806
1985	46571.96916221486
1986	45464.63940973155
1987	44369.889378661515
1988	43243.78968697741
1989	42124.171369406205
1990	40979.356517826025
1991	39856.320905427034
1992	33978.56362789553
1993	33773.1806399933
1994	31907.754627088503
1995	31611.372417999377
1996	31190.202606125484
1997	30737.6364399309
1998	30291.031427333957
1999	29803.333812862744
2000	29335.700828444984
2001	28925.371455924113
2002	28528.370102994835
2003	28130.41277965958
2004	27403.605750384126
2005	26937.308453839014
2006	26475.162160776646
2007	26012.530049185534
2008	25566.261126116922
2009	25149.191377879713
2010	24824.26031754908
2011	24585.6131422976
2012	24320.519301282147
2013	24009.058425223506
2014	23668.85741311341
2015	23323.73039903164
2016	22999.06631916278
2017	22672.96678636043
2018	22376.394477273367
2019	22132.485848690416
2020	21960.05896211381