Year	% of total reserves
1982	13.409905469043792
1983	20.089046536653825
1984	26.314004214833776
1985	38.024892226735076
1986	37.009448514827845
1987	36.61423329614326
1988	37.07553157238611
1989	29.96195696025088
1990	27.024862430151224
1991	22.381388403314777
1992	55.386476883797606
1993	55.930750939120685
1994	30.25717409828494
1995	27.806560163669747
1996	22.739935675586594
1997	21.484757940341467
1998	11.344978204830989
1999	9.404385831205136
2000	7.615139768148419
2001	25.584306291148216
2002	22.059553858094695
2003	21.16605587504892
2004	18.584199457576624
2005	17.833207180630207
2006	16.042201095774473
2007	13.172701446011025
2008	9.521080170793796
2009	9.805091607342835
2010	17.58317400024851
2011	23.700099764200328
2012	23.3831724394243
2013	27.755896514069573
2014	31.780502443232216
2015	24.146340717674423
2016	25.87102800640278
2017	31.852116807651715
2018	38.47278577952663
2019	37.398433351976735
2020	36.82285937872396
2021	42.18944066470694
2022	38.25979796467206