Year	Percent
1982	0.00869
1983	0.01348
1984	0.01502
1985	0.0109
1986	0.0244
1987	0.05809
1989	0.18109
1994	0.31797
1995	0.49557
1996	0.56659
1997	0.65052
1998	1.40476
2000	2.27928
2001	1.5854
2002	1.60648
2003	1.57541
2005	2.06488
2009	1.6644
2010	2.02125
2011	1.58743
2012	2.28512
2013	1.87508
2014	1.78262
2015	1.67693