Year	Percent
1990	2.35202
1991	2.97353
1992	2.46057
1993	2.38774
1994	2.171
1995	2.1363
1996	1.80005
1997	2.05029
1998	2.03559
1999	1.94437
2000	1.73125
2001	2.06938
2002	1.50978
2003	1.72082
2004	1.50541
2005	1.45078
2006	1.30297
2007	1.33517
2008	1.2866
2009	1.23997
2010	1.19465
2011	1.14969
2012	1.10714
2013	1.06669
2014	1.02835
2015	0.99194
2016	0.95644
2017	0.92205
2018	0.8895
2019	0.85841
2020	0.83696