Year	% of total reserves
1990	269.920348323544
1991	174.71311111388016
1992	390.8778170001834
1993	352.9486198863636
1994	242.95054548557263
1995	107.91105749300813
1996	59.79256390463272
1997	15.59964922585876
1998	16.351697802272945
1999	27.781162916458563
2000	23.633039760262527
2001	11.598696239043743
2002	7.382692493008837
2003	4.3978724161076554
2004	5.273052765012996
2005	5.376764689000934
2006	4.315886757270076
2007	5.368421474835964
2008	4.825303602460478
2009	7.256155522269005
2010	2.091281684630073
2011	2.900994469730469
2012	2.272041222454545
2013	4.854105009752013
2014	7.2422682053679095
2015	20.812109934875377
2016	27.744933837426228
2017	40.00592266385163
2018	12.132557415001473
2019	25.81559477263618
2020	47.39703343873868
2021	28.02150526719349
2022	39.90362751898187