Year	Percent
1989	101.89596
1990	102.67475
1991	103.47473
1992	99.06451
1993	100.26416
1994	102.0131
1995	96.9683
1996	91.84363
1997	89.85595
2006	89.14128
2007	94.08483
2008	103.23221
2009	105.66829
2010	106.32225
2011	103.59868
2013	99.88662