Year	Percent
1999	87.3402
2000	92.43972
2001	103.84407
2002	96.81855
2003	99.67785
2004	104.64411
2005	111.72707
2006	118.17761
2007	100.14563
2008	103.58356
2009	90.84762
2010	84.26721
2011	82.87033
2012	81.82371
2013	73.10349
2014	69.11721
2015	70.04648
2016	63.97749
2017	61.36439