Year	Percent
1990	2.1043
1991	1.94042
1992	1.73268
1993	1.49551
1994	1.42116
1995	1.75862
1996	1.92086
1997	1.847
1998	1.736
1999	1.56273
2000	1.38023
2001	1.15118
2002	1.14004
2003	1.12116
2004	1.09444
2005	1.02975
2006	1.01778
2007	0.85908
2008	0.86531
2009	0.97595
2010	0.80458
2011	0.89323
2012	0.88337
2013	0.87637
2014	0.85403
2015	0.83931
2016	0.85562
2017	0.85319
2018	0.84305
2019	0.84236
2020	0.97367