Year	Percent
1977	74.17655
1978	86.28495
1979	70.68273
1980	84.05405
1981	132.83379
1982	122.82913
1983	130.39075
1984	123.47561
1985	123.61331
1986	126.35659
1987	113.46999
1988	112.16783
1989	115.52878
1990	105.54124
1991	113.6646
1992	107.35826
1993	104.78972
1995	112.03501
1996	121.54989
1997	127.97927
1999	106.14634
2000	95.07246
2001	118.12081
2002	113.50575
2003	117.12062
2004	125.61576
2005	120.80537
2006	109.04255
2007	101.10076
2008	107.27719
2014	119.93927
2016	103.45133