Year	Percent change
1980	-1.5
1981	-1.734
1982	1.872
1983	-0.968
1984	6.161
1985	0.553
1986	3.899
1987	6.837
1988	10.74
1989	10.041
1990	4.837
1991	2.807
1992	3.146
1993	0.54
1994	7.353
1995	9.572
1996	4.221
1997	8.908
1998	5.561
1999	2.681
2000	12.157
2001	1.409
2002	7.384
2003	0.579
2004	7.063
2005	4.921
2006	4.664
2007	6.056
2008	-2.193
2009	-11.999
2010	7.251
2011	4.277
2012	-1.463
2013	0.398
2014	1.713
2015	1.16
2016	5.6
2017	-0.312
2018	2.5
2019	2.9
2020	3.1
2021	3.027
2022	2.945
2023	2.91
2024	2.889