Year	Percent
1992	5.69
1993	4.06
1994	4.44
1995	5.24
1996	4.69
1997	6.7
1998	8.73
1999	5.73
2000	4.45
2001	3.79
2002	2.76
2003	3.78
2004	4.06
2005	4.13
2006	2.57
2007	2.09
2008	3.72
2009	4.14
2010	3.76
2011	2.91
2012	3.09
2013	2.72
2014	2.83
2015	2.84
2016	3.19
2017	3.35
2018	2.75
2019	2.78
2020	2.48