Year	Percent
1990	0.98547
1991	0.95685
1992	1.03287
1993	1.00173
1994	0.97205
1995	1.57891
1996	1.37947
1997	1.3549
1998	1.3284
1999	1.28966
2000	1.22842
2001	0.93751
2002	0.91538
2003	0.88815
2004	0.854
2005	0.81955
2007	0.75502
2008	0.73056
2009	0.70037
2010	0.67099
2011	0.65127
2012	0.63635
2013	0.62478
2014	0.6129
2015	0.60066
2016	0.58778
2017	0.57419
2018	0.56039
2019	0
2020	0.53705