Year	Percent
1983	13.5101
1984	1.6996
1985	2.6057
1986	3.3312
1987	1.7527
1988	1.6437
1989	0.6769
1990	2.5578
1991	2.2138
1992	4.4998
1993	10.9638
1994	4.42
1995	8.1988
1996	8.3606
1997	10.2804
1998	4.2162
1999	5.8473
2000	5.6163
2001	4.4868
2002	2.8632
2003	4.116
2004	2.7078
2005	1.6643
2006	2.677
2007	1.0907
2008	3.1373
2009	2.2947
2010	1.212
2011	1.3444
2012	3.5335
2013	2.0936
2014	1.3867
2015	2.6921
2016	3.0765
2017	2.7367