Year	Percent change
1980	17.71
1981	7.16
1982	2.617
1983	3.114
1984	3.219
1985	-0.721
1986	1.967
1987	5.822
1988	5.518
1989	4.88
1990	7.861
1991	3.206
1992	2.862
1993	-0.545
1994	0.123
1995	-1.265
1996	3.187
1997	-1.124
1998	4.66
1999	1.098
2000	0.432
2001	0.935
2002	2.55
2003	1.809
2004	2.756
2005	2.543
2006	0.009
2007	5.23
2008	0.728
2009	2.399
2010	2.925
2011	4.044
2012	1.839
2013	1.059
2014	1.327
2015	0.9
2016	-1.121
2017	2.356
2018	2.229
2019	2.008
2020	2.008
2021	2.008
2022	2.008
2023	2.008
2024	2.008