Year	Percent change
1980	1.467
1981	0.55
1982	-36.789
1983	22.71
1984	44.479
1985	24.3
1986	-6.773
1987	16.729
1988	-28.209
1989	-42.195
1990	-13.421
1991	38.2
1992	4.495
1993	7
1994	8.03
1995	6.493
1996	4.038
1997	10.19
1998	3.9
1999	-0.8
2000	1.1
2001	3.9
2002	3.4
2003	1.7
2004	7.5
2005	2.748
2006	1.701
2007	9.341
2008	9.249
2009	10.054
2010	8.037
2011	0.918
2012	2.72
2013	2.619
2014	1.884
2015	0.415
2016	1.606
2017	0.552
2018	0.25
2019	1.3
2020	1.95
2021	2.5
2022	2.9
2023	3.1
2024	3.25