Year	Percent
1991	8.55
1992	8.549
1993	8.548
1994	8.563
1995	8.601
1996	8.282
1997	8.234
1998	8.802
1999	9.051
2000	9.192
2001	9.113
2002	8.725
2003	9.839
2004	10.972
2005	10.997
2006	11.6
2007	12.346
2008	12.109
2009	11.588
2010	10.873
2011	11.892
2012	11.689
2013	11.238
2014	11.127
2015	11.613
2016	10.649
2017	10.332
2018	10.714
2019	11.012
2020	11.247
2021	11.432
2022	11.571