Year	%
1997	8.646934460887952
1998	8.777608530083782
1999	8.525793222533997
2000	10.03908660769389
2002	12.159203980099502
2003	12.566654816921437
2004	12.911871354248783
2005	15.916260395755673
2006	16.285956006768192
2007	17.426352044555184
2008	18.94158075601375
2009	19.580045472783205
2010	19.431216931216934
2011	21.017919362867097
2012	21.601711026615973
2013	21.147672552166934
2014	21.352583586626146
2015	23.275548551339554
2016	23.304327095005362
2017	23.193699349389348
2018	22.98234936092515
2019	23.075969760812995
2020	24.4061602714696
2021	25.29005344805111
2022	26.09783212896054
2023	26.56316160903318