Year	Percent
1977	81.95298
1978	92.83167
1979	111.46091
1981	129.57854
1982	117.72
1984	116.79587
1985	96.03073
1986	101.91805
1990	127.7707
1991	97.0516
1993	111.07668
1998	108.12362
1999	107.3993
2001	105.5396
2005	108.05611
2006	103.55556
2012	100.6377
2013	110.97993