Year	% of total reserves
1999	8.759282477098763
2000	7.6924105319425475
2001	3.2437703286284396
2002	25.64536305746862
2003	5.7347044338863755
2004	10.382048803416433
2005	32.22622389089756
2006	31.626170611154848
2007	27.510120324910403
2008	25.93850824145178
2009	31.846215841362934
2010	26.047559745421765
2011	31.265151126724206
2012	25.78604405480459
2013	20.465067625842497
2014	16.0677043046432
2015	13.495304509583244
2016	12.599947644821757
2017	4.410996770549767
2018	43.58045061973857
2019	38.91355110788239
2020	34.32012774868652
2021	28.57121288861476
2022	32.73710310010135