Year	Percent
1992	0.022
1993	0.019
1994	0.015
1995	0.012
1996	0.011
1997	0.011
1998	0.011
1999	0.011
2000	0.012
2001	0.013
2002	0.014
2003	0.014
2004	0.015
2005	0.015
2006	0.016
2007	0.016
2008	0.017
2009	0.017
2010	0.018
2011	0.018
2012	0.019
2013	0.02
2014	0.02
2015	0.021
2016	0.022
2017	0.022
2018	0.023
2019	0.023
2020	0.024
2021	0.024
2022	0.024
2023	0.024
2024	0.024