Year	Percent
1990	113.2374
1991	112.92526
1992	104.11169
1993	112.85954
1994	150.51901
1995	153.44286
1996	121.25495
1997	62.92533
1998	96.82898
1999	73.89511
2000	58.03076
2001	56.56874
2002	53.90131
2003	50.97601
2004	44.73471
2005	36.19914
2006	32.01883
2007	30.31338
2008	24.91899
2009	28.3795
2010	22.32107
2011	21.11838
2012	22.81319
2013	19.611
2014	19.25262
2015	20.03095
2016	26.01504