Year	cubic meters
1962	4356.117111485969
1963	4277.798448852458
1964	4204.077298092071
1965	4135.872011994029
1966	4073.842641462594
1967	4018.0771617307446
1968	3968.1760547442955
1969	3923.80461905375
1970	3883.141704335163
1971	3839.500864887564
1972	3790.6046310527518
1973	3740.6374474825216
1974	3691.27484521158
1975	3643.2049957448503
1976	3596.529349178043
1977	3549.9906165612606
1978	3501.8316220867086
1979	3452.2749952800928
1980	3404.702035373435
1981	3360.476767641409
1982	3318.5267124116353
1983	3278.4841791794056
1984	3241.198331795734
1985	3200.573436073963
1986	3156.934156547761
1987	3118.2954617432247
1988	3085.24681572801
1989	3056.8137492935093
1990	3031.9348007687217
1991	3008.8761847449978
1992	2987.1598799535122
1993	2967.6021311092804
1994	2950.684382042934
1995	2936.179388326546
1996	2923.633772233702
1997	2913.1273560107147
1998	2903.433612688005
1999	2893.6079146204816
2000	2882.4435915547406
2001	2868.7394803547377
2002	2852.973779387859
2003	2836.98841858582
2004	2821.098288827569
2005	2804.8134689480125
2006	2788.8350730870875
2007	2772.841462067312
2008	2757.0302476373186
2009	2740.5257384610663
2010	2722.832653570598
2011	2704.1872649680986
2012	2684.606925307104
2013	2665.3173497583516
2014	2647.069163643332
2015	2629.81816587989
2016	2613.4360558894186
2017	2597.0389697871037
2018	2551.988457568872
2019	2526.3905839317613
2020	2529.399326942648