Year	Percent
1996	5.74
1997	4.6
1998	5.44
2000	2.4407
2001	2.6207
2003	3.5938
2004	3.3045
2005	2.4601
2006	2.0417
2007	1.6387
2008	2.0182
2009	2.9973
2010	2.8492
2011	2.3179
2012	2.096
2013	1.9995
2014	2.287
2015	2.3262
2016	2.982
2017	2.5384