Year	Percent
1982	1.98142
1983	0.90425
1984	-3.08759
1985	-1.44806
1986	-9.17236
1987	0.80979
1988	0.93099
1989	7.14774
1990	23.24293
1991	93.31995
1992	173.69068
1993	318.89723
1994	64.31939
1995	60.27243
1996	10.80757
1997	21.67213
1998	-1.9318
1999	10.88176
2000	11.99969
2001	10.44854
2002	6.36969
2003	10.23657
2004	16.69147
2005	20.09844
2006	21.98677
2007	11.62857
2008	21.44875
2009	1.8267
2010	39.17819
2011	15.11927
2012	12.78438
2013	2.90785
2014	7.44884
2015	1.73301
2016	2.12329
2017	10.58967