Year	Percent
1994	3.791
1995	4.7888
1996	5.0987
1997	5.0266
1998	5.1987
1999	4.5884
2000	4.3625
2001	3.7991
2002	4.2791
2003	3.991
2004	4.9372
2005	5.2711
2006	5.1473
2007	4.7057
2008	3.8456
2009	4.4916
2010	4.1655
2011	4.0783
2012	4.3148
2013	4.8045
2014	5.0068
2015	4.8759
2016	5.12
2017	4.7413