Year	Percent
1991	2.952
1992	5.752
1993	2.67
1994	2.784
1995	3.465
1996	1.615
1997	1.233
1998	1.676
1999	1.456
2000	1.49
2001	1.041
2002	1.006
2003	1.838
2004	1.484
2005	1.085
2006	1.195
2007	1.147
2008	1.175
2009	0.857
2010	0.742
2011	0.815
2012	0.892
2013	0.915
2014	0.842
2015	0.745
2016	0.607
2017	0.598
2018	0.566
2019	0.539
2020	0.515
2021	0.491
2022	0.471