Year	Percent
1977	76.76702
1978	85.85592
1979	72.56461
1980	84.47702
1981	132.34502
1982	122.85319
1983	129.07143
1984	127.29993
1985	127.43431
1986	126.36364
1987	110.17192
1988	109.42623
1989	113.47656
1990	102.24579
1991	112.78788
1992	111.72986
1993	106.90846
1994	108.59375
1995	110.37838
1996	121.2153
1997	122.70876
1999	106.59755
2000	99.02416
2001	117.21915
2002	111.30515
2003	119.5713
2004	123.06604
2005	122.92052
2006	113.31029
2007	118.59693
2008	106.67739
2014	112.41546
2016	99.5281