Year	Percent
1991	7.089
1992	6.823
1993	5.86
1994	6.098
1995	6.954
1996	6.372
1997	5.864
1998	5.639
1999	5.716
2000	6.117
2001	6.019
2002	6.262
2003	6.599
2004	8.077
2005	8.431
2006	9.921
2007	11.326
2008	12.864
2009	15.757
2010	16.512
2011	13.687
2012	12.205
2013	13.154
2014	13.037
2015	12.305
2016	11.678
2017	11.656
2018	11.446
2019	11.215
2020	10.978
2021	10.74
2022	10.498