Year	Percent
1991	2.059
1992	1.91
1993	1.77
1994	2.322
1995	1.888
1996	1.771
1997	1.499
1998	1.344
1999	1.678
2000	1.65
2001	1.659
2002	1.835
2003	2.19
2004	2.078
2005	2.016
2006	1.831
2007	1.776
2008	1.884
2009	1.93
2010	1.916
2011	1.729
2012	1.623
2013	1.332
2014	1.51
2015	2.516
2016	4.291
2017	3.971
2018	3.21
2019	2.718
2020	2.562
2021	2.494
2022	2.428