Year	Percent (Units)
1994	0.014
1995	0.014
1996	0.014
1997	0.015
1998	0.017
1999	0.017
2000	0.015
2001	0.014
2002	0.012
2003	0.013
2004	0.015
2005	0.016
2006	0.015
2007	0.014
2008	0.015
2009	0.016
2010	0.016
2011	0.017
2012	0.020
2013	0.020
2014	0.021
2015	0.023
2016	0.024
2017	0.023
2018	0.023
2019	0.022
2020	0.020
2021	0.021
2022	0.021
2023	0.019