Year	Percent change
1980	-2.79
1981	8.391
1982	1.244
1983	4.53
1984	-1.678
1985	5.525
1986	8.607
1987	20.214
1988	-6.943
1989	-7.014
1990	8.855
1991	8.372
1992	5.742
1993	12.844
1994	12.602
1995	10.108
1996	8.595
1997	4.927
1998	-0.397
1999	15.883
2000	12.79
2001	-6.772
2002	0.32
2003	-3.014
2004	9.988
2005	4.215
2006	2.905
2007	26.634
2008	5.04
2009	-15.694
2010	17.917
2011	10.378
2012	-0.183
2013	0.573
2014	2.865
2015	-0.006
2016	10.447
2017	2.356
2018	8.36
2019	4.9
2020	4.372
2021	3.6
2022	3.64
2023	3.6
2024	3.6