Year	Percent
1991	0.723
1992	0.702
1993	0.71
1994	0.963
1995	0.753
1996	0.749
1997	0.723
1998	0.719
1999	0.727
2000	0.701
2001	0.688
2002	0.683
2003	0.746
2004	0.8
2005	0.875
2006	1
2007	1.125
2008	1.308
2009	1.497
2010	1.731
2011	2.006
2012	2.414
2013	2.428
2014	2.665
2015	2.695
2016	2.668
2017	2.701
2018	2.724
2019	2.734
2020	2.758
2021	2.785
2022	2.815