Year	Percent
1982	0.89373
1983	2.114
1984	1.62032
1985	1.57366
1986	1.97092
1987	4.24216
1988	3.01775
1989	2.5487
1990	2.2859
1991	1.49481
1992	1.42599
1993	1.51285
1994	1.40563
1995	1.30811
1996	1.18116
1997	1.39548
1998	0.84224
1999	1.53227
2000	1.59444
2001	1.27253
2002	1.69296
2003	1.56086
2004	2.12883
2005	1.64264
2006	2.12231
2007	1.82172
2008	1.50473
2009	1.71695
2010	1.61452
2011	1.55732
2012	2.0661
2013	1.71547
2014	1.84804
2015	1.9993
2016	1.7523