Year	cubic meters
1961	204904.60398493306
1962	199577.82995968888
1963	194293.71608611938
1964	189053.78580206068
1965	183864.33131358642
1966	178727.2686286949
1967	173666.52272684601
1968	168676.34656150988
1969	163753.16349720696
1970	158913.2054726272
1971	154149.64597659008
1972	149467.37100359934
1973	144902.08991892665
1974	140481.43366998254
1975	136620.84944936258
1976	133299.86826130137
1977	130115.15190943984
1978	127059.9305062308
1979	124145.93746400048
1980	121360.81554468046
1981	118682.30564435938
1982	116131.01671135792
1983	113738.19005651558
1984	110903.56934645327
1985	107633.49340987271
1986	104477.32394982642
1987	101432.20445077203
1988	98520.59346675329
1989	95723.6122986732
1990	93064.78692565506
1991	90513.41902208813
1992	88061.76064813456
1993	85576.57021441942
1994	83170.36437610986
1995	80953.67808660511
1996	78818.57349033142
1997	77216.39756288353
1998	75583.06204007535
1999	73591.34724872782
2000	70835.31427586846
2001	68221.60713511966
2002	66643.4915425807
2003	64824.085827089635
2004	62658.55153750537
2005	60443.70580904853
2006	58216.940972479904
2007	56112.62359626816
2008	54284.01101134047
2009	52146.58357664491
2010	50023.84019050521
2011	48427.03746943861
2012	47101.18714086671
2013	45981.14441683274
2014	44895.09411892468
2015	43835.52122606768
2016	42800.75822892776
2017	41789.49389534556
2018	40800.858361841856
2019	39851.1291063492
2020	38932.519421539924