Year	%
1997	5.067001675041875
1999	5.978538579458355
2000	6.8406840684068415
2001	7.510040160642572
2003	7.91164658634538
2004	9.474590869939702
2005	9.836065573770496
2006	10.861561119293079
2007	13.721940622737149
2008	13.932242101256188
2009	15.095702419646083
2010	15.203426124196996
2011	16.256684491978604
2012	18.10099573257468
2013	18.27573922337015
2014	19.239052404881555
2015	19.1535150645624
2016	20.014372978799862
2017	20.833333333333332
2018	21.33190883190883
2019	23.548272176701108
2020	24.750000000000014
2021	26.423936553713048
2022	26.319648093841646
2023	26.1852662290299