Year	Percent
1990	1.93447
1991	1.77448
1992	1.74479
1993	1.69442
1994	1.83077
1995	2.25725
1996	2.03999
1997	2.08059
1998	2.01497
1999	1.95924
2000	1.85456
2001	1.94202
2002	1.84781
2003	1.74878
2004	1.73478
2005	1.69363
2006	1.44766
2007	1.41136
2008	1.35978
2009	1.35258
2010	1.32427
2011	1.27587
2012	1.29242
2013	1.27455
2014	1.29237
2015	1.27771
2016	1.40746
2017	1.37508
2018	1.3489
2019	1.32403
2020	1.31058