Year	Percent
2000	39.20514
2001	39.02032
2002	38.8355
2003	38.65067
2004	38.46585
2005	37.59396
2006	36.72869
2007	35.87007
2008	35.01807
2009	34.17271
2010	33.33399
2011	32.5019
2012	31.67644
2013	30.85762
2014	30.04543
2015	29.23988
2016	28.44096
2017	27.64868
2018	26.86303
2019	26.08401
2020	25.31163
2021	24.54589
2022	24.54589