Year	cubic meters
1961	8125.448411092746
1962	7891.308869399026
1963	7664.120992383231
1964	7440.50518904375
1965	7222.325446066726
1966	7010.555559821238
1967	6803.665490982471
1968	6593.424707210735
1969	6379.20646013125
1970	6168.219687312384
1971	5960.736627832468
1972	5755.120052832002
1973	5554.268375900188
1974	5360.111429059308
1975	5171.195505295366
1976	4988.443735610344
1977	4812.477516706602
1978	4646.016414265373
1979	4492.30628373107
1980	4352.859587787307
1981	4223.030295717696
1982	4097.576566388887
1983	3967.7446918779365
1984	3843.131427408555
1985	3721.8163793151193
1986	3601.398886224521
1987	3485.561786458302
1988	3381.0780462698117
1989	3291.1623123675063
1990	3205.3713476129064
1991	3123.7326105710235
1992	3045.605439712367
1993	2950.5760595808415
1994	2837.9986258005224
1995	2748.6847134615623
1996	2697.431688586136
1997	2642.6856783991216
1998	2574.5944293500334
1999	2507.479752399509
2000	2437.346838865608
2001	2371.9118872006807
2002	2310.642121669007
2003	2249.9647639446794
2004	2189.7308453229134
2005	2129.8441752755266
2006	2070.9011467171335
2007	2013.5918890792775
2008	1959.371773159611
2009	1910.9178768710528
2010	1862.0930764120756
2011	1809.7195772727746
2012	1757.831983782242
2013	1705.4576044253215
2014	1653.0697741859458
2015	1598.695981751875
2016	1544.0664998560158
2017	1492.8813021450999
2018	1446.0209917834504
2019	1402.9794841474927
2020	1361.326572553407