Year	cubic meters
1961	171673.08294814185
1962	167492.26395105876
1963	163376.1351578091
1964	159337.53825096777
1965	155362.12970407397
1966	151479.00311668048
1967	147679.18469275718
1968	143941.53670545173
1969	140264.3562321908
1970	136652.81234904134
1971	133186.11827726418
1972	129786.27445254527
1973	126366.5755353046
1974	122979.82577448084
1975	119643.55791226777
1976	116381.78345772607
1977	113116.28580413236
1978	109838.147997019
1979	106634.47727246069
1980	103510.61423716042
1981	100518.17117239369
1982	97675.23180774388
1983	94824.88451514377
1984	91988.11145647537
1985	89296.71691690583
1986	86735.53468120354
1987	84301.07454364667
1988	81979.34202560298
1989	79757.53708725475
1990	90508.7542329813
1991	103133.39892617505
1992	97436.16226238974
1993	93774.71842968608
1994	94108.87832569012
1995	93352.29007170389
1996	90745.50151862597
1997	83917.25758402215
1998	75779.85044088717
1999	71691.19162589528
2000	69079.28367546
2001	67076.99902872505
2002	65346.68540373959
2003	64826.186408347276
2004	64052.32819003813
2005	61231.02527065644
2006	57880.469306421226
2007	55054.862170152555
2008	52855.701029126925
2009	51215.52363007437
2010	49751.788328031456
2011	47833.72995467754
2012	46170.8228102333
2013	45174.12706081544
2014	44253.68157440438
2015	43362.041172691715
2016	42498.061557167224
2017	41695.93199893842
2018	40904.88979097806
2019	40118.035283410856
2020	39311.39023945354