Year	Percent change
1980	-2.028
1981	-0.771
1982	2.01
1983	4.222
1984	2.276
1985	4.196
1986	3.141
1987	5.301
1988	5.758
1989	2.569
1990	0.739
1991	-1.088
1992	0.371
1993	2.526
1994	3.895
1995	2.455
1996	2.535
1997	4.293
1998	3.341
1999	3.214
2000	3.453
2001	2.841
2002	2.5
2003	3.339
2004	2.348
2005	3.149
2006	2.548
2007	2.546
2008	-0.346
2009	-4.247
2010	1.711
2011	1.645
2012	1.447
2013	2.046
2014	2.948
2015	2.349
2016	1.789
2017	1.823
2018	1.398
2019	1.177
2020	1.402
2021	1.543
2022	1.556
2023	1.587
2024	1.594