Year	% of total reserves
1970	93.7240924937401
1971	225.75327129154502
1972	130.14242617183538
1973	49.710268464758876
1974	44.40141355776625
1975	100.09139722639273
1976	51.42901507649393
1977	70.86474634964578
1978	57.775385980800586
1979	59.441763007602965
1980	111.68842051980276
1981	258.1052672542815
1982	366.8104904216252
1983	313.8233822207869
1984	413.75082022343656
1985	143.14088516800336
1986	99.60398749317235
1987	94.61768401523815
1988	110.8664316189051
1989	264.998316462704
1990	167.7969848781439
1991	181.51723803792635
1992	141.31429905023666
1993	55.826056194579365
1994	44.80903491524481
1995	133.63925124430287
1996	119.16140167316212
1997	142.64694824988564
1998	124.5428326087661
1999	111.63198291051542
2000	112.61604363183942
2001	137.4315501126713
2002	141.38541270277113
2003	158.12546449003213
2004	135.04209749322945
2005	124.78059470454433
2006	88.22126440781899
2007	41.60562968704823
2008	41.90868098150186
2009	40.17294914725974
2010	31.438004119786733
2011	55.647133151404425
2012	58.42202788295611
2013	120.16669789771743
2014	107.8964102676788
2015	232.887650249561
2016	106.77391706824315
2017	100.3476583522164
2018	102.33872980693573
2019	149.32081444226938
2020	108.12898069318668
2021	110.89501914779952
2022	109.58738174865974