Year	Percent
2000	2.7939
2001	3.09531
2002	3.39684
2003	3.69805
2004	4.00925
2005	4.31644
2006	4.61983
2007	4.92163
2008	5.24482
2009	5.56531
2010	5.88367
2011	6.19978
2012	6.51409
2013	6.82389
2014	7.13201
2015	7.43845
2016	7.74355
2017	8.04716
2018	8.34992
2019	8.65204
2020	8.95354
2021	9.25478
2022	9.33622