Year	Percent
1977	49.48542
1984	113.69863
1988	70.54085
1999	44.58101
2002	50.52526
2003	53.98366
2004	68.78553
2005	72.46604
2007	69.97027
2008	72.28916
2009	79.4283
2010	77.87369
2011	105.48727
2013	93.61441
2014	83.61694
2016	77.27273
2017	84.03112