Year	Percent
1985	20.42051
1986	24.50411
1987	41.32726
1988	33.28938
1989	36.43075
1990	43.41542
1991	30.60759
1992	36.53473
1993	36.1923
1994	39.48075
1995	27.64953
1996	53.95083
1997	30.32819
1998	42.33919
1999	48.69373
2000	40.85525
2001	50.77564
2002	60.09773
2003	64.20221
2004	134.78802
2005	40.51751
2006	20.42538
2007	18.50947
2008	11.98044
2009	16.59608
2010	2.39639
2011	4.20852
2012	8.9141
2013	13.75874
2014	13.26251
2015	13.44267
2016	31.71654