Year	Percent
1992	23.34163
1993	16.43845
1994	14.94755
1995	12.32939
1996	12.15216
1997	11.40678
1998	8.5658
1999	9.88635
2000	8.11078
2001	8.72483
2002	7.99591
2003	7.86221
2004	7.12296
2005	6.36952
2006	5.49583
2007	5.66029
2008	5.3158
2009	6.14688
2010	4.51053
2011	4.98897
2012	4.28833
2013	4.50355
2014	4.32955
2015	4.71055
2016	4.556
2017	4.51698
2018	4.39586
2019	4.46634
2020	5.39128
2021	5.03
2022	5.24714