Year	cubic meters
1961	5622.449180821742
1962	5500.592955710786
1963	5370.639882083193
1964	5239.48226720687
1965	5112.183431856044
1966	4983.618029331641
1967	4847.552083872201
1968	4712.898323439177
1969	4587.318966078556
1970	4467.596224521115
1971	4355.8463845109745
1972	4249.01430795321
1973	4154.234448375329
1974	4076.169121351935
1975	4006.3977987056583
1976	3944.15314616855
1977	3888.2530015427083
1978	3834.6863289540447
1979	3781.2150590332326
1980	3727.679130282386
1981	3674.212109084396
1982	3621.2131096346047
1983	3569.266653678798
1984	3517.9552761820673
1985	3466.924274663816
1986	3416.094946637028
1987	3366.175652170156
1988	3317.2481456087753
1989	3269.0956047009595
1990	3221.2277175779464
1991	3173.0194462522236
1992	3125.0013118009238
1993	3077.2033108686774
1994	3030.957612962546
1995	2993.0040540463274
1996	2962.7209664731863
1997	2935.0727304451543
1998	2910.0529560144196
1999	2887.371232939407
2000	2867.2842397496406
2001	2849.545446464654
2002	2834.369873677211
2003	2817.2914585147314
2004	2797.619768398839
2005	2779.9697124374434
2006	2764.5098497216572
2007	2750.8050621053776
2008	2738.1532268093642
2009	2725.62599798084
2010	2714.041132306062
2011	2703.3800198992976
2012	2692.0853093708274
2013	2679.8050173869347
2014	2666.5466322690113
2015	2652.62333560258
2016	2638.87461686593
2017	2625.7703843747695
2018	2613.293182748879
2019	2601.3920709026106
2020	2590.126045198009