Year	cubic meters
1961	117674.21986988641
1962	114186.45494525152
1963	110762.71399461754
1964	107435.46203933899
1965	104230.57084168856
1966	101150.5692126102
1967	98197.64900738423
1968	95374.07794003162
1969	92675.19920757956
1970	90094.36824457125
1971	87616.22298392889
1972	85234.04419940524
1973	82959.83189398632
1974	80796.08393329059
1975	78737.61582960396
1976	76783.1135608759
1977	74925.43109548002
1978	73153.24211848789
1979	71450.46536953909
1980	69801.17905739792
1981	68194.57119293572
1982	66626.1187066729
1983	65094.14586330516
1984	63606.56684253929
1985	62173.85466520107
1986	60793.24954605333
1987	59462.89249970944
1988	58181.60754163115
1989	56951.4307691987
1990	55755.83028023223
1991	54595.362831349084
1992	53476.73135811323
1993	52387.364290456106
1994	51326.658863711935
1995	50293.310142938295
1996	49285.504505330115
1997	48302.8240532505
1998	47345.44882341707
1999	46413.33007148876
2000	45507.07575062522
2001	44625.58934526485
2002	43768.16330715574
2003	42934.26468628442
2004	42117.45342953543
2005	41320.464095965115
2006	40551.29575639299
2007	39806.3418554651
2008	39081.32004454011
2009	38377.86917417063
2010	37697.14072982879
2011	37032.27772364811
2012	36379.499433001794
2013	35744.60246035908
2014	35126.58040682546
2015	34520.23818458926
2016	33926.6270872575
2017	33349.096437237415
2018	32795.11098360124
2019	32273.825691099322
2020	31808.896990403304