Year	Percent change
1980	-2.649
1981	13.26
1982	4.89
1983	10.857
1984	-4.363
1985	12.902
1986	2.21
1987	-7.533
1988	-5.928
1989	7.562
1990	9.732
1991	0.564
1992	0.215
1993	-4.36
1994	-11.726
1995	15.231
1996	-11.707
1997	-9.391
1998	18.909
1999	-4.047
2000	-14.151
2001	1.964
2002	13.445
2003	22.263
2004	17.77
2005	7.205
2006	-4.359
2007	34.974
2008	22.802
2009	-9.833
2010	-5.251
2011	13.154
2012	4.42
2013	5.74
2014	3.391
2015	-3.277
2016	2.523
2017	19.339
2018	10.166
2019	7.729
2020	17.786
2021	10.401
2022	3.593
2023	5.675
2024	4.913