Year	Percent
1990	0.97479
1991	0.95118
1992	0.93002
1993	0.94888
1994	0.91438
1995	1.29616
1996	1.18707
1997	0.99542
1998	1.1097
1999	1.10445
2000	1.1971
2001	1.14951
2002	1.15698
2003	1.16307
2004	1.11809
2005	1.10372
2006	1.09728
2007	1.07382
2008	1.06582
2009	1.05913
2010	1.0636
2011	1.16107
2012	1.10089
2013	1.13147
2014	1.12797
2015	1.13067
2016	1.13801
2017	1.14325
2018	1.13064
2019	1.13886
2020	1.13165