Year	Percent
1975	80.61328
1976	90.86422
1977	66.97639
1978	70.60112
1979	98.6439
1980	135.17298
1981	125.52061
1982	67.16154
1983	65.39643
1984	70.4762
1985	96.90188
1986	131.08466
1987	106.81741
1988	124.62012
1989	112.75625
1990	108.39428
1991	137.00699
1992	164.93693
1993	319.92531
1994	198.44174
1995	209.95449
1996	281.2588
1997	233.05108
1998	203.43083
1999	366.87361
2000	363.14115
2001	298.73863
2002	278.36313
2003	442.79172
2004	509.44063
2005	581.04249
2006	886.11468
2007	1254.46531
2008	605.96973
2009	1076.93596
2010	1185.85701
2011	908.61628
2012	1078.30479
2013	1124.7052
2014	1109.25606
2015	1029.42559
2016	995.14578
2017	1274.13179