Year	Percent
1980	205.11697
1981	209.01508
1982	195.4696
1983	166.86902
1984	86.93782
1985	66.84759
1986	60.74611
1987	67.17681
1988	68.67901
1989	73.97035
1990	82.62663
1991	82.86155
1992	83.30602
1993	79.72535
1994	79.21027
2006	66.435
2007	87.54559
2008	91.42995
2009	63.10643
2010	65.42071
2011	82.73765
2012	74.04425
2013	72.94227
2014	74.54032
2015	69.11091
2016	75.73735
2017	77.60558