Year	Percent (Units)
1992	0.991
1993	0.834
1994	0.624
1995	0.529
1996	0.458
1997	0.427
1998	0.408
1999	0.393
2000	0.397
2001	0.422
2002	0.432
2003	0.455
2004	0.483
2005	0.476
2006	0.486
2007	0.500
2008	0.496
2009	0.423
2010	0.419
2011	0.425
2012	0.422
2013	0.459
2014	0.420
2015	0.388
2016	0.408
2017	0.411
2018	0.411
2019	0.412
2020	0.409
2021	0.397
2022	0.273
2023	0.278
2024	0.278
2025	0.287
2026	0.292
2027	0.296
2028	0.299
2029	0.303