Year	Percent
1977	54.60993
1984	109.86025
1988	63.48183
1999	50.48104
2002	58.55263
2003	56.75116
2004	71.55579
2005	75.72867
2007	72.52139
2008	74.95108
2009	82.9686
2010	84.54797
2011	108.99777
2013	98.21429
2014	90.36918
2016	81.5619
2017	89.44799