Year	Percent
2000	14.9683
2001	15.14129
2002	15.31429
2003	15.48728
2004	15.83182
2005	16.18015
2006	16.53226
2007	16.88817
2008	17.24787
2009	17.61136
2010	17.97863
2011	18.3497
2012	18.72456
2013	19.1032
2014	19.48564
2015	19.87187
2016	20.26189
2017	20.65569
2018	21.05329
2019	21.45468
2020	21.85985
2021	22.26882
2022	22.26882