Year	Percent change
1983	-21.003
1984	9.483
1985	6.204
1986	16.415
1987	-4.11
1988	0.516
1989	-0.791
1990	15.675
1991	-1.754
1992	-13.302
1993	-34.906
1994	4.528
1995	4.957
1996	19.894
1997	-4.013
1998	5.461
1999	-5.534
2000	-10.449
2001	5.315
2002	19.286
2003	26.894
2004	1.531
2005	2.343
2006	-3.265
2007	5.095
2008	14.937
2009	8.352
2010	-0.765
2011	16.924
2012	5.172
2013	13.859
2014	-6.996
2015	-9.981
2016	7.217
2017	5.968
2018	5.644
2019	6.74
2020	8.136
2021	8.631
2022	8.652
2023	8.604
2024	8.475