Year	Percent change
1980	8.81
1981	9.611
1982	-3.934
1983	5.318
1984	14.695
1985	-2.056
1986	-6.979
1987	1.566
1988	5.529
1989	-2.907
1990	-7.9
1991	3.6
1992	17.5
1993	23.5
1994	22.9
1995	15.1
1996	-7.046
1997	12.3
1998	5.9
1999	10.2
2000	24.735
2001	10.983
2002	18.317
2003	12.498
2004	15.784
2005	5.292
2006	7.148
2007	6.068
2008	15.455
2009	-1.141
2010	25.984
2011	13.424
2012	0.878
2013	15.818
2014	8.523
2015	5.263
2016	17.732
2017	7.915
2018	7.252
2019	5.017
2020	6.2
2021	6.098
2022	5.997
2023	5.913
2024	5.719