Year	Percent
1995	3.29
1996	2.95
1997	2.74
1998	2.99
1999	3.3
2000	2.66
2001	2.31
2002	2.06
2003	2.16
2004	2.43
2005	2.3
2006	2.76
2007	2.74
2008	2.61
2009	2.44
2010	2.47
2011	2.41
2012	2.6
2013	2.48
2014	2.28
2015	2.16
2016	2.34