Year	Percent
1991	1.10153
1992	1.00543
1993	0.96157
1994	0.97554
1995	0.99546
1996	1.04217
1997	1.03138
1998	0.97532
1999	0.9584
2000	0.99479
2001	1.08343
2002	0.9005
2003	0.83226
2004	0.95106
2005	0.72696
2006	0.73759
2007	0.77886
2008	0.83833
2009	0.69533
2010	0.8037
2011	0.91002
2012	0.84792
2013	0.94264
2014	0.90455
2015	0.68469
2016	0.69843
2017	0.85175
2018	0.68909
2019	0.79085
2020	0.73895
2021	0.71194
2022	0.92016