Year	Percent
1994	8.149
1995	6.486
1996	7.118
1997	7.082
1998	6.3352
1999	11.6647
2000	14.2014
2001	12.2022
2002	16.5462
2003	13.5356
2004	16.3533
2005	13.2266
2006	9.8997
2007	7.8013
2008	5.3742
2009	6.4106
2010	9.5557
2011	10.7168
2012	10.9671
2013	10.5607
2014	9.7198
2015	8.2381
2016	8.3736
2017	5.6444