Year	Percent
1990	1.17373
1991	1.14981
1992	1.42341
1993	1.39308
1994	1.35036
1995	2.12235
1996	1.59625
1997	1.41448
1998	1.59631
1999	1.5535
2000	1.64294
2001	1.65872
2002	1.61808
2003	1.45843
2004	1.50192
2005	1.48249
2007	1.43471
2008	1.39123
2009	1.34946
2010	1.31996
2011	2.70826
2012	2.66478
2013	2.60836
2014	2.53678
2015	2.4531
2016	1.11572
2017	1.07466
2018	1.04051
2019	1.00563
2020	1.14407