Year	Percent
1991	0.66
1992	0.45
1993	0.56
1994	0.32
1995	0.68
1996	1.53
1997	1.1
1999	2.33
2003	0.63
2004	0.4
2006	0.92
2007	0.91
2008	0.96
2009	0.74
2012	0.75
2013	0.74
2014	0.7
2015	1.58
2016	0.62
2017	0.54
2018	0.69
2019	1.01
2020	1.04