Year	Percent
2000	6.80567
2001	6.79693
2002	6.78819
2003	6.77944
2004	6.7707
2005	9.19841
2006	11.61982
2007	14.03492
2008	16.44373
2009	18.84624
2010	21.24244
2011	23.63234
2012	26.01595
2013	28.39325
2014	30.76425
2015	33.12895
2016	35.48735
2017	37.83945
2018	40.18525
2019	42.52475
2020	44.85794
2021	47.18484
2022	49.50543