Year	Percent change
1980	3.006
1981	-1.659
1982	-0.055
1983	-3.065
1984	12.825
1985	4.275
1986	5.315
1987	12.033
1988	5.962
1989	8.549
1990	9.631
1991	1.799
1992	7.115
1993	-11.196
1994	8.051
1995	9.554
1996	-0.299
1997	9.952
1998	8.851
1999	4.32
2000	10.257
2001	2.125
2002	0.732
2003	1.463
2004	4.669
2005	3.032
2006	7.799
2007	5.373
2008	-3.651
2009	-12.884
2010	12.393
2011	0.526
2012	-8.055
2013	-2.362
2014	3.238
2015	6.805
2016	3.597
2017	5.451
2018	2.307
2019	1.988
2020	3.176
2021	3.133
2022	3.003
2023	2.98
2024	2.97