Year	Percent
1995	0.6077
1996	0.49535
1997	0.56469
1998	0.68041
1999	0.83236
2000	0.83522
2001	0.90533
2002	1.10586
2003	1.50706
2004	1.66306
2005	1.37684
2006	1.27044
2007	1.01602
2008	0.80787
2009	0.90432
2010	0.7731
2011	0.61313
2012	0.74987
2013	0.60322
2014	0.4884
2015	0.46413
2016	0.41818
2017	0.32749