Year	Percent change
1980	2.834
1981	5.442
1982	-12.922
1983	23.6
1984	1.021
1985	-8.187
1986	4.958
1987	27.063
1988	32.747
1989	21.581
1990	23.682
1991	12.95
1992	8.968
1993	11.778
1994	15.749
1995	19.968
1996	-0.605
1997	-11.298
1998	-21.647
1999	10.489
2000	27.118
2001	-5.496
2002	6.221
2003	11.096
2004	20.305
2005	16.19
2006	2.943
2007	4.2
2008	11.399
2009	-20.772
2010	22.956
2011	12.4
2012	5.629
2013	1.681
2014	-5.298
2015	0.004
2016	-0.992
2017	6.924
2018	9.099
2019	6.464
2020	5.844
2021	5.77
2022	5.631
2023	5.665
2024	5.46