Year	cubic meters
1961	4848.008060915222
1962	4704.730071458435
1963	4550.258640837745
1964	4401.29012816882
1965	4256.068282811869
1966	4115.090187696044
1967	3978.07448085563
1968	3844.418145129406
1969	3714.358644752936
1970	3587.682710641057
1971	3466.2973484400877
1972	3350.0470862442025
1973	3237.6333672702312
1974	3130.796309146924
1975	3029.879953057519
1976	2933.494186597899
1977	2838.666181727861
1978	2745.772582789919
1979	2659.849794050551
1980	2578.1182651695713
1981	2502.264122508577
1982	2433.0089643938813
1983	2361.823749305292
1984	2289.128357149806
1985	2234.373603516498
1986	2179.806679633627
1987	2120.735010605784
1988	2072.1306318244183
1989	2018.0489250736273
1990	1993.387729033596
1991	1972.389019217233
1992	1914.534213678227
1993	1824.2294781180049
1994	1738.4370354650541
1995	1680.282524231154
1996	1626.667588444967
1997	1576.3003246193484
1998	1526.8839144861724
1999	1477.70425546081
2000	1429.2177087545028
2001	1384.4280088192784
2002	1340.6794952174118
2003	1300.3890121118309
2004	1263.5078682798792
2005	1226.5370774492658
2006	1217.7568179073355
2007	1228.1545927032896
2008	1204.7210966274963
2009	1162.1365351955692
2010	1125.864088693782
2011	1087.1558985573595
2012	1039.4382049114813
2013	992.0579001065336
2014	957.9146720089278
2015	932.2573847166414
2016	909.609071469251
2017	888.4141257644085
2018	867.193716787343
2019	846.8965092465702
2020	827.1262831971363