Year	Percent
1990	0.73734
1991	0.71902
1992	0.69823
1993	0.67882
1994	0.66191
1995	1.16281
1996	1.28404
1997	1.52304
1998	1.56011
1999	1.52693
2000	1.49533
2001	1.40246
2002	1.45705
2003	1.621
2004	2.02942
2005	2.00106
2006	1.97228
2007	1.94729
2008	1.92409
2009	2.29018
2010	2.2636
2011	2.24149
2012	2.22319
2013	2.2062
2014	2.18677
2015	2.17333
2016	2.12632
2017	1.46525
2018	1.42541
2019	1.39694
2020	1.3718