Year	cubic meters
1961	764.7042993873396
1962	729.7122344494793
1963	696.9089736738036
1964	662.4916095729067
1965	623.7002434442886
1966	581.5292000989112
1967	538.840781240124
1968	499.03266688325573
1969	465.0756804970991
1970	437.9166468683823
1971	416.78889214823505
1972	400.0499769179376
1973	385.87450365336025
1974	373.1702619414484
1975	361.4899747487062
1976	350.61725602411343
1977	340.0787267292904
1978	329.6112713522375
1979	318.9780728298968
1980	307.63637380616115
1981	295.6662353061035
1982	283.4169108470966
1983	271.1961459925998
1984	259.32160403720394
1985	247.86552168786974
1986	236.8220837634849
1987	226.22528190257452
1988	216.015763449436
1989	205.98292818323662
1990	195.94396002743218
1991	186.0145936903959
1992	176.36926033783766
1993	167.33079654611572
1994	159.41410408104784
1995	152.97670918387377
1996	147.9817630920464
1997	144.07441168735008
1998	140.78102090185314
1999	137.75620988633094
2000	134.8845985126303
2001	132.08581317023385
2002	129.27606163700648
2003	126.38717803931976
2004	123.27329273267792
2005	120.1014205426964
2006	112.25324859584684
2007	105.35329113949471
2008	102.82120583342994
2009	100.58265674782055
2010	98.39483683914233
2011	95.92150751478908
2012	94.5664109259979
2013	88.63112220776227
2014	78.77084222200304
2015	71.83298178707399
2016	68.44190105508912
2017	66.76207182091397
2018	65.20160633048323
2019	63.74616389699555
2020	62.40437467476753