Year	Percent
1991	14.744
1992	14.397
1993	14.211
1994	14.05
1995	13.876
1996	13.856
1997	12.386
1998	12.817
1999	14.42
2000	15.155
2001	13.728
2002	14.216
2003	14.336
2004	15.288
2005	13.862
2006	11.898
2007	11.49
2008	9.84
2009	10.879
2010	11.288
2011	10.514
2012	10.218
2013	9.565
2014	8.434
2015	8.995
2016	9.126
2017	9.122
2018	9.122
2019	9.122
2020	9.122
2021	9.122
2022	9.122