Year	cubic meters
1961	2636.928392796853
1962	2559.541768893603
1963	2483.0654107602636
1964	2408.2011720951623
1965	2334.890656757835
1966	2263.7957761107996
1967	2194.929643930968
1968	2128.2114378063457
1969	2064.1152911595877
1970	2002.8338310464815
1971	1945.1670436079096
1972	1890.414446783504
1973	1837.382389583879
1974	1786.4964475837155
1975	1737.9184795199496
1976	1691.8237331148061
1977	1647.0686332764187
1978	1603.238254982519
1979	1561.1380333856337
1980	1520.5228670856995
1981	1481.8460136407232
1982	1444.1170073885603
1983	1405.923507216781
1984	1367.178863341531
1985	1327.2908417761473
1986	1284.4834343784078
1987	1240.3329817856825
1988	1198.0578733087493
1989	1158.560244770678
1990	1123.4385645865582
1991	1095.061105754084
1992	1072.7775395823182
1993	1053.487042109382
1994	1035.4076601030295
1995	1018.5039432016725
1996	1003.0987915950977
1997	989.2890032930957
1998	977.053079673488
1999	966.252738803487
2000	956.9936863623228
2001	948.555394597562
2002	939.9617477531241
2003	931.3145538188387
2004	922.6446678521414
2005	913.9658821840446
2006	905.2012622061742
2007	896.0700009884772
2008	885.9741044008153
2009	875.4996674957791
2010	865.1167006704519
2011	854.2555225092992
2012	842.976238249772
2013	831.5758867940106
2014	818.5705744233128
2015	801.7681277984034
2016	794.0126624460404
2017	790.9435690188039
2018	781.3094729326407
2019	771.2561774736212
2020	761.8797934972437