Year	Percent
1992	0.02656
1993	0.41583
1994	1.2033
1995	2.59132
1996	2.73326
1997	5.01966
1998	5.0447
1999	5.35016
2000	6.86821
2001	6.21981
2002	8.93072
2003	9.11305
2004	8.24977
2005	4.22031
2006	2.91542
2007	2.66451
2008	1.89551
2009	1.69697
2010	1.46495
2011	0.89457
2012	1.26041
2013	1.46805
2014	1.43636
2015	1.98617
2016	2.30321
2017	3.53346
2018	5.37915
2019	4.57358
2020	6.08641
2021	4.05914