Year	Percent
1976	79.49233
1977	70.91302
1978	67.59482
1979	66.35798
1980	67.03918
1981	60.21376
1982	66.17024
1983	59.83301
1984	57.92791
1985	58.48768
1986	50.78202
1987	45.4115
1988	56.06203
1989	54.04742
1990	50.52
1991	45.97874
1992	44.15933
1993	50.28742
1994	42.38294
1995	45.83302
1996	75.26902
1997	60.47268
1998	62.95939
1999	69.61641
2000	81.90447
2001	103.60001
2002	85.38436
2003	86.51762
2004	81.56323
2005	100.0071
2006	100.53027
2007	91.81307
2008	112.12668
2009	117.02875
2010	108.08182
2011	111.38797
2012	117.15109
2013	98.64533
2014	104.00934