Year	% of total reserves
1990	119.5911741235834
1991	101.86291005058308
1992	100.64462103566706
1993	87.55959874516378
1994	87.30094878042534
1995	92.43689784151456
1996	79.57256009367478
1997	78.67317608375281
1998	67.61212087312593
1999	59.80071025350797
2000	57.19851740663488
2001	44.00994631406067
2002	38.76279458328035
2003	36.63757762556106
2004	34.965139825780106
2005	32.998561888652965
2007	27.093581676945664
2017	39.197493339814734
2020	30.968987719654642
2021	29.63743049959968
2022	37.10583886311016