Year	Percent
1990	2.985
1991	3.077
1992	3.846
1993	3.125
1994	3.125
1995	3.7412
1996	2.6106
1997	1.4021
1998	2.0465
1999	0.7515
2000	1.1326
2001	1.5128
2002	1.0267
2003	0.9419
2004	1.5559
2005	1.827
2006	1.2534
2007	1.0495
2008	1.1385
2009	1.5259
2010	1.8078
2011	1.3222
2012	1.5293
2013	1.3472
2014	1.4778
2015	1.7326
2016	2.5801
2017	2.5304