Year	Percent
1990	0.85001
1991	0.82906
1992	0.84103
1993	0.81709
1994	0.79652
1995	1.39069
1996	1.35293
1997	1.31432
1998	1.27942
1999	1.24667
2000	1.21672
2001	1.21654
2002	1.18579
2003	1.18158
2004	1.13888
2005	1.14931
2006	1.80867
2007	1.77583
2008	1.06449
2009	1.07044
2010	1.02745
2011	0.98366
2012	1.46058
2013	1.43998
2014	1.6427
2015	1.55153
2016	1.51629
2017	1.49405
2018	1.44069
2019	1.39451
2020	1.47776