Year	cubic meters
1961	3572.478703623474
1962	3484.1057588874137
1963	3412.329090987415
1964	3316.6063402567765
1965	3226.2885430837805
1966	3150.269088094175
1967	3072.2313347440354
1968	3000.8379079208103
1969	2937.716039666759
1970	2876.065588018185
1971	2808.431996024645
1972	2810.6878781401965
1973	2816.7830993014045
1974	2748.6098482199063
1975	2683.2161893422444
1976	2626.0223149248127
1977	2561.4728010290705
1978	2490.462716089726
1979	2431.4569623658317
1980	2332.572967102374
1981	2240.1638214433556
1982	2185.877363588542
1983	2128.42213677503
1984	2077.5388722805096
1985	2033.1348433233145
1986	1995.3563337489336
1987	1950.4557105989043
1988	1908.2521472578835
1989	1872.081734418595
1990	1834.4966704614853
1991	1798.0892352722908
1992	1751.671793121641
1993	1810.9093789264873
1994	1800.799368753589
1995	1695.6628954741814
1996	1696.3136541277165
1997	1698.216467567948
1998	1666.8489264896427
1999	1627.7843040170353
2000	1594.8864705590458
2001	1555.8957079704394
2002	1513.02358361591
2003	1466.291474841441
2004	1412.8229269421681
2005	1361.506502885284
2006	1313.6263268474665
2007	1266.2674777323844
2008	1215.253386975214
2009	1155.078337504705
2010	1102.271874371686
2011	1063.9048289540326
2012	1027.0043966201142
2013	991.1743119934949
2014	958.559637416718
2015	937.8075141687241
2016	922.65415868019
2017	901.7898017613228
2018	875.2794629855974
2019	847.1694519116809
2020	823.2252968786914