Year	Percent
1988	112.39954
1999	138.00322
2000	124.71729
2001	120.30769
2002	106.66667
2003	98.69942
2004	103.96601
2005	106.29371
2006	94.61756
2007	96.6325
2008	92.12121
2009	84.48276
2010	81.2398
2011	99.4863
2012	102.90909
2013	102.50482
2014	109.79592
2015	116.55914
2016	119.42605