Year	% of total reserves
1970	140.19719970533237
1971	197.05148594787346
1972	90.42239120551041
1973	54.78757399339278
1974	43.51946229120133
1975	64.3918173180473
1976	45.335102069007874
1977	124.22629975212136
1978	164.60956249563634
1979	123.00625563582564
1980	125.28470802578629
1981	253.56381477498653
1982	444.0166311024178
1983	145.29383361918198
1984	173.91564387357494
1985	115.89414506232951
1986	62.43039075926063
1987	129.34176127299756
1988	210.25900759230902
1989	199.17412769457488
1990	179.76750090153027
1991	202.80282970154414
1992	221.34720676531944
1993	250.617593413537
1994	204.71653085578424
1995	73.39088281338545
1996	78.86725312732638
1997	93.4866517048262
1998	130.6248523341028
1999	59.88781847451033
2000	67.60826495219958
2001	128.88983071866411
2002	230.42991569131365
2003	147.1345438972941
2004	119.73564774127388
2005	70.78068401472392
2006	87.44548189427677
2007	53.80948940325968
2008	36.97440069333559
2009	35.481984232346456
2010	40.56904870743227
2011	28.56803391415299
2012	31.496412640236503
2013	19.69484360041059
2014	25.650640126530178
2015	42.68929103767968
2016	20.71657602316274
2017	50.4431888221872
2018	49.90074119004473
2019	31.733667555783146
2020	15.812361000455358
2021	15.83744920805062
2022	22.735754325996766