Year	cubic meters
1961	2023.7932944558142
1962	1964.0242752652223
1963	1905.829687980286
1964	1849.422975628216
1965	1794.8669165155602
1966	1742.2973325311684
1967	1690.6990683185409
1968	1640.736467533763
1969	1594.1237138382146
1970	1554.591478529019
1971	1535.621954093854
1972	1514.1310607331668
1973	1475.8629363560956
1974	1439.385285427429
1975	1405.6159981590445
1976	1374.7039804095518
1977	1343.780041482618
1978	1312.3761445013627
1979	1281.9237001211272
1980	1251.046038315489
1981	1218.7359975939135
1982	1185.6993010562346
1983	1153.2697977597527
1984	1122.583570707193
1985	1094.2161930886825
1986	1068.46580297861
1987	1044.8774257277241
1988	1022.5065075965953
1989	1001.0136550274709
1990	979.9561541484469
1991	961.1614433217652
1992	943.6327535180382
1993	925.7727978803365
1994	908.1875102057571
1995	891.3916676679967
1996	875.8987597173459
1997	860.3791046659047
1998	844.387634044426
1999	828.3708397559686
2000	812.7354751070077
2001	797.4452345751231
2002	782.7652914951598
2003	769.2127025939596
2004	756.5401545395381
2005	745.1427867446054
2006	736.1765448389604
2007	728.4789926154016
2008	722.0399419017781
2009	715.7131969538428
2010	707.5894201472502
2011	699.0166932176508
2012	690.3777496537607
2013	681.6847707967075
2014	673.2439436786173
2015	665.2727618323513
2016	657.1347991503159
2017	648.9735303104385
2018	641.4800893316619
2019	634.3789069810933
2020	627.1616507542118