Year	Percent
1994	5.241
1995	6.1682
1996	6.5216
1997	7.3346
1998	7.6134
1999	6.371
2000	5.5879
2001	5.7957
2002	6.5649
2003	6.7611
2004	11.8867
2005	10.3122
2006	9.7501
2007	9.6197
2008	8.6047
2009	10.0979
2010	9.3704
2011	9.0998
2012	9.2271
2013	10.0102
2014	9.9255
2015	10.0131
2016	10.2251
2017	8.7403