Year	Percent
1990	1.88572
1991	1.85794
1992	1.83865
1993	1.85594
1994	1.79364
1995	1.8541
1996	1.80958
1997	1.7559
1998	1.76615
1999	1.79109
2000	1.64204
2001	1.6109
2002	1.64801
2003	1.67359
2004	1.65817
2005	1.65109
2007	1.58587
2008	1.57256
2009	1.51819
2010	1.51949
2011	1.47072
2012	1.47947
2013	1.47922
2014	1.44777
2015	1.46068
2016	1.46024
2017	1.26558
2018	1.27366
2019	1.26189
2020	1.30601