Year	Percent
1991	2.026
1992	2.21
1993	2.242
1994	2.125
1995	2.045
1996	1.901
1997	1.805
1998	1.799
1999	1.701
2000	1.466
2001	1.1
2002	1.223
2003	1.079
2004	1.016
2005	0.963
2006	1.03
2007	1.378
2008	1.274
2009	1.447
2010	1.557
2011	1.532
2012	1.642
2013	1.869
2014	1.667
2015	1.557
2016	1.536
2017	1.607
2018	1.617
2019	1.607
2020	1.587
2021	1.581
2022	1.572