Year	Percent
1981	1.12268
1982	0.01474
1983	0.10751
1984	-0.02273
1985	0.16834
1986	0.30565
1987	0.75761
1988	0.0471
1989	-0.44082
1990	0.0789
1991	-1051.85127
1992	78.45801
1993	27.5489
1994	10.91802
1995	5.01669
1996	5.77816
1997	25.4253
1998	7.72669
1999	0.54231
2000	0.72236
2001	0.7811
2002	1.88909
2003	34.83059
2004	75.05518
2005	199.29359
2006	72.13631
2007	110.91025
2008	49.46106
2009	22.12882
2010	9.91067
2011	6.15048
2012	4.4379
2013	3.24154
2014	3.29087
2015	4.36742
2016	7.68167
2017	8.69913
2018	5.75388
2019	3.93553
2020	5.83577
2021	4.44823