Year	Percent change
1980	8.837
1981	5.779
1982	17.384
1983	11.707
1984	11.742
1985	13.041
1986	6.122
1987	-4.13
1988	-1.823
1989	0.449
1990	0.325
1991	-1.754
1992	-0.007
1993	-0.744
1994	32.104
1995	8.076
1996	2.835
1997	1.784
1998	0.989
1999	0.818
2000	0.754
2001	3.053
2002	2.398
2003	-0.048
2004	0.515
2005	1.707
2006	2.114
2007	5.863
2008	6.335
2009	-2.248
2010	1.229
2011	3.403
2012	1.418
2013	0.71
2014	-1.083
2015	0.129
2016	0.838
2017	1.317
2018	0.465
2019	1.305
2020	1.5
2021	1.5
2022	1.5
2023	1.5
2024	1.5