Year	Percent change
1980	7.6
1981	-2.1
1982	10.8
1983	21
1984	14.7
1985	10.5
1986	8.4
1987	11.2
1988	10.2
1989	19.8
1990	12
1991	1.1
1992	7.5
1993	-2.2
1994	13.2
1995	12.9
1996	12.7
1997	1.315
1998	13.431
1999	0.262
2000	-4.579
2001	3.795
2002	9.38
2003	16.788
2004	6.209
2005	-4.522
2006	9.137
2007	11.808
2008	1.371
2009	-18.475
2010	3.774
2011	11.418
2012	-3.683
2013	11.693
2014	3.553
2015	4.818
2016	1.973
2017	6.666
2018	4.408
2019	3.699
2020	3.847
2021	3.8
2022	3.7
2023	3.731
2024	3.731