Year	cubic meters
1961	6041.778901101114
1962	5925.1359078048845
1963	5809.843812032186
1964	5696.247596895545
1965	5582.979356933827
1966	5470.235083352707
1967	5349.476865741504
1968	5218.0492322945065
1969	5084.7026720112535
1970	4951.495970720153
1971	4818.00004818
1972	4684.078427086464
1973	4550.142571133895
1974	4416.327161516126
1975	4285.163336142496
1976	4154.980783213878
1977	4024.7927231747562
1978	3896.8883346647704
1979	3772.1258758404765
1980	3654.8817036621913
1981	3550.44291775399
1982	3457.685137428577
1983	3369.48983116048
1984	3281.701233919664
1985	3194.462930919739
1986	3108.26072090927
1987	3023.5306271054483
1988	2940.6719435390983
1989	2859.9755948749234
1990	2783.454220296484
1991	2713.2317529512047
1992	2649.0651007748515
1993	2590.0137702398783
1994	2534.4366580918227
1995	2480.5688771291548
1996	2427.734438222251
1997	2376.0823550144246
1998	2325.766194600734
1999	2279.4490571628835
2000	2235.644368598139
2001	2190.8164625251716
2002	2146.5100429838635
2003	2104.7831196393804
2004	2064.857163505714
2005	2024.6911080628258
2006	1984.592943449024
2007	1945.2130737770688
2008	1906.3656727087866
2009	1867.7246289064628
2010	1829.2013706815603
2011	1790.8549989478724
2012	1752.9687255771285
2013	1715.7735350511084
2014	1679.2329263992208
2015	1643.349365119362
2016	1608.0789888399318
2017	1575.497857322914
2018	1545.76826615038
2019	1517.09385501134
2020	1488.5271767849301