Year	Percent
1996	1.03515
1997	0.93463
1998	0.86669
1999	1.01591
2000	0.61952
2001	0.83248
2002	0.57139
2003	1.09867
2004	1.32909
2005	1.41708
2006	1.38981
2007	1.26793
2008	1.0799
2009	1.17979
2010	1.50229
2011	1.32762
2012	1.24865
2013	1.35511
2014	1.45135
2015	1.42349
2016	1.50665
2017	1.41328