Year	Percent
1990	1.03037
1991	1.63439
1992	1.39291
1993	1.62973
1994	1.64134
1995	2.45315
1996	2.62739
1997	2.56147
1998	2.50288
1999	2.39493
2000	2.40464
2001	1.5617
2002	1.72832
2003	1.76524
2004	1.76371
2005	1.83166
2006	1.56996
2007	1.58763
2008	1.62204
2009	1.62387
2010	1.64472
2011	1.64934
2012	1.64138
2013	1.64895
2014	1.6436
2015	1.65119
2016	1.67354
2017	1.39147
2018	1.40681
2019	1.40433
2020	1.43686