Year	cubic meters
1962	66753.17691345469
1963	64682.75994879754
1964	62717.75472634849
1965	60872.90249674847
1966	59188.40363381555
1967	57719.6784680328
1968	56425.2666612646
1969	55227.564648168496
1970	54109.47740289671
1971	53066.91449814127
1972	52106.337079636
1973	51234.28874963212
1974	50415.33049853787
1975	49582.84416224966
1976	48669.72265929319
1977	47639.786480312505
1978	46527.849077021114
1979	45399.68418993765
1980	44292.27002925927
1981	43216.32381211873
1982	42173.39988507564
1983	41162.46847935316
1984	40179.5201256472
1985	39246.09016840765
1986	38442.997988306866
1987	37825.69179281855
1988	37351.02110234572
1989	36948.1716155216
1990	36582.39688376921
1991	36377.21193835114
1992	36283.50187263538
1993	36175.965980653775
1994	36102.54386996509
1995	36036.78655367146
1996	35842.60888997136
1997	35484.70491143117
1998	35075.99389149416
1999	34672.37941177185
2000	34293.92354917485
2001	33934.76917225313
2002	33592.543043755024
2003	33263.19517747749
2004	32941.2687753694
2005	32631.44299555504
2006	32329.916893429043
2007	32055.31253649029
2008	31837.86442087984
2009	31673.55053290333
2010	31541.07133584999
2011	31430.44294356281
2012	31337.158186242603
2013	31255.028994376287
2014	31183.101052907514
2015	31127.344090710863
2016	31087.654117998063
2017	31065.734223122698
2018	31066.511714958495
2019	31084.472462205966
2020	31018.380699287936