Year	Percent
1983	45.94449
1984	25.27681
1985	120.33595
1986	137.28088
1987	180.98801
1988	189.97511
1989	115.44673
1990	44.38009
1991	26.01934
1992	45.06803
1993	30.13687
1994	6.8485
1995	9.37644
1996	4.57248
1997	3.09527
1998	8.78571
1999	-0.11313
2000	11.11731
2001	4.53448
2002	-3.16956
2003	7.80674
2004	15.58755
2005	-1.74119
2006	2.40562
2007	7.32125
2008	6.36428
2009	34.02147
2010	10.56723
2011	4.63177
2012	21.52117
2013	4.02502
2014	3.40469
2015	5.00446
2016	3.52515
2017	5.98887