Year	cubic meters
1961	80190.36426241774
1962	78542.70290413909
1963	76918.61250481216
1964	75320.04193105201
1965	73745.39880952815
1966	72192.03318692741
1967	70659.1368317095
1968	69146.22524263263
1969	67653.44849800428
1970	66184.10783277468
1971	64736.07411864555
1972	63310.89047445411
1973	61910.372547451705
1974	60533.35168281721
1975	59187.45280605081
1976	57871.749719460255
1977	56581.78528862397
1978	55321.30834620822
1979	54096.157479529014
1980	52910.624802129954
1981	51765.39615452184
1982	50658.32453976035
1983	49586.47980106591
1984	48545.04036036255
1985	47528.59154069372
1986	46534.926570645766
1987	45560.76064102715
1988	44605.642033182485
1989	43674.47535586783
1990	42769.405684230165
1991	41891.5895353015
1992	41044.468808164645
1993	40228.0393012701
1994	39447.74713721136
1995	38704.47266845723
1996	37987.99078825644
1997	37295.92157116228
1998	36623.945568249175
1999	35963.75517060447
2000	35320.860046067246
2001	34701.24457985997
2002	34098.889926648626
2003	33508.59376742364
2004	32930.86070853541
2005	32365.0892977874
2006	31804.539257018714
2007	31252.72882146217
2008	30716.779853193024
2009	30195.048071809895
2010	29687.174455922617
2011	29193.22994088443
2012	28714.162761713982
2013	28250.036371340073
2014	27800.71094707725
2015	27366.787540402078
2016	26946.60355153571
2017	26540.083439923616
2018	26148.22814522907
2019	25769.88048634175
2020	25426.933716214644