Year	Percent
1985	18.1274
1986	11.17835
1987	9.02665
1988	14.92302
1989	71.67935
1990	79.67631
1991	46.03173
1992	51.90468
1993	49.44407
1994	60.6646
1995	65.60712
1996	74.61836
1997	77.39991
1998	76.66779
1999	81.17165
2000	96.62678
2001	95.59985
2002	103.95816
2003	114.797
2004	128.67392
2005	120.07477
2006	127.82671
2007	143.69832
2008	144.65662
2009	119.83733
2010	135.48939
2011	150.25555
2012	146.52137
2013	154.22397
2014	160.07463
2015	169.56753
2016	171.17652
2017	190.22321