Year	cubic meters
1961	3118.174889567375
1962	3042.800350018129
1963	2976.833031942045
1964	2910.8602664509567
1965	2836.9802465544876
1966	2758.4036218129913
1967	2676.462707999891
1968	2594.203729645741
1969	2514.638504833003
1970	2438.1686838021164
1971	2365.88955081221
1972	2297.1390463100815
1973	2230.317099442092
1974	2165.800460471976
1975	2103.745197924777
1976	2043.7988239336157
1977	1986.0964883305332
1978	1930.1281422232191
1979	1872.1521117678753
1980	1810.3748581237808
1981	1745.692641225616
1982	1680.5533443011552
1983	1621.3275224954925
1984	1568.5033951494281
1985	1515.936804264793
1986	1462.0324035628037
1987	1410.3683451584059
1988	1366.1251298717639
1989	1330.1644615340242
1990	1297.8209449721187
1991	1269.0896125549566
1992	1240.6610869131412
1993	1201.8105592340798
1994	1411.0311444279494
1995	1670.506780762866
1996	1414.6356717509168
1997	1239.1198753262797
1998	1200.3065203808887
1999	1186.0786330181568
2000	1171.394930375368
2001	1155.1639293132087
2002	1134.6933568839934
2003	1108.7778793444252
2004	1080.5458189530696
2005	1052.4800917851271
2006	1024.8039226473684
2007	997.5671961263312
2008	971.1719366885859
2009	945.8630786528959
2010	921.5221100799872
2011	898.1810604436145
2012	876.3567617012538
2013	855.7517779369175
2014	835.6459468400752
2015	815.9437819887539
2016	796.2518163970711
2017	776.7568830267093
2018	758.0709822557129
2019	740.1620004257101
2020	722.6333794855185