Year	cubic meters
1961	2516.9146561783964
1962	2445.9671338960497
1963	2378.7910584013557
1964	2317.3828189559413
1965	2259.2139524037098
1966	2203.116766445604
1967	2152.269642181936
1968	2102.90436872951
1969	2055.8411471676022
1970	2011.4248310069713
1971	1972.161413489596
1972	1935.5085564401159
1973	1901.583927044391
1974	1869.2927120990018
1975	1838.1141544001716
1976	1809.000610708564
1977	1781.0162888152038
1978	1754.163636552983
1979	1727.7559612509494
1980	1701.038262868774
1981	1674.7045599067515
1982	1649.0215009009733
1983	1624.8896309065083
1984	1604.9614071747242
1985	1589.2370446670448
1986	1573.506889970547
1987	1558.0818558785095
1988	1542.8997383779738
1989	1527.7142440778043
1990	1512.7381533299729
1991	1497.8391389593755
1992	1482.354766606042
1993	1467.3729123820206
1994	1452.6828599551
1995	1438.1392443007383
1996	1424.5020190256796
1997	1411.206700326721
1998	1401.0563727400188
1999	1391.1330488013978
2000	1379.5491590802276
2001	1369.0051822493162
2002	1361.1157379484691
2003	1354.079035202505
2004	1348.7230151149108
2005	1345.8667808553862
2006	1338.8168187268038
2007	1332.0697191939516
2008	1321.9933956186223
2009	1315.2068023266484
2010	1308.6704086232035
2011	1298.6456957715093
2012	1291.8364521904077
2013	1285.9691367803769
2014	1277.9166407782627
2015	1271.1960673016085
2016	1266.161299421609
2017	1262.6087841630347
2018	1257.1469823684213
2019	1252.7812806928998
2020	1251.055270425773