Year	cubic meters
1961	4819.486566793385
1962	4720.019042393566
1963	4621.249017383403
1964	4523.466886544001
1965	4426.56911710116
1966	4331.609522610374
1967	4241.298730963118
1968	4153.3453439561
1969	4065.433239975534
1970	3977.018662690944
1971	3888.270186711215
1972	3798.958823996369
1973	3707.714895716073
1974	3613.5951034707177
1975	3516.2352696790167
1976	3417.9672018981623
1977	3318.8338338740455
1978	3220.0092130145954
1979	3123.6613573987743
1980	3029.412483556356
1981	2939.791982713704
1982	2855.7374355919756
1983	2785.0735081715948
1984	2717.0721499330084
1985	2644.007134703705
1986	2575.631946157405
1987	2510.103250768844
1988	2446.0034500601964
1989	2382.901831862792
1990	2321.0809700484247
1991	2262.3656195769763
1992	2205.9841162156354
1993	2150.3186582517533
1994	2095.658344952779
1995	2042.7477786042227
1996	1991.7772405707217
1997	1942.1540233421076
1998	1893.8983796002567
1999	1846.350781668477
2000	1798.9127469036237
2001	1751.8454899546405
2002	1705.470282813121
2003	1660.1587317577196
2004	1616.006826948805
2005	1573.0576144380552
2006	1531.2156957451964
2007	1490.2825351807153
2008	1450.2977133083766
2009	1411.277053877794
2010	1373.0728960734855
2011	1335.6400219274622
2012	1299.419602768956
2013	1264.8366266330993
2014	1232.0281654349135
2015	1201.1144711820436
2016	1171.3764507040187
2017	1142.143022177725
2018	1113.9807849807244
2019	1087.0394344262693
2020	1060.830186983801