Year	% of total reserves
2007	58.794638553863784
2008	138.17790351617424
2009	210.78808288688938
2010	33.44390097660301
2011	115.86610899451395
2012	117.29679301433849
2013	88.33018188122705
2014	42.73989063645316
2015	35.717522109886126
2016	21.952890701995553
2017	17.149255687763052
2018	17.865732616802532
2019	18.12759369324544
2020	19.257029591933197
2021	10.884158444910764
2022	9.736587433116313