Year	Percent
1993	0.76175
1994	1.04163
1995	0.9581
1996	0.8736
1997	1.04677
1998	1.06749
1999	1.28711
2000	1.37633
2001	1.50221
2002	1.66713
2003	1.74305
2004	1.69969
2005	1.89926
2006	1.85701
2007	1.99798
2008	2.09296
2009	2.20913
2010	1.70353
2011	1.6799
2012	1.89575
2013	1.9068
2014	1.95282
2015	2.05429
2016	2.13287
2017	2.0983