Year	Percent change
1981	-7.544
1982	3.951
1983	2.559
1984	5.399
1985	8.605
1986	3.976
1987	6.881
1988	4.613
1989	6.153
1990	1.801
1991	-6.796
1992	1.185
1993	1.914
1994	14.79
1995	10.288
1996	2.347
1997	11.161
1998	10.964
1999	3.151
2000	12.685
2001	-4.305
2002	-0.447
2003	4.823
2004	7.831
2005	8.14
2006	9.28
2007	9.362
2008	1.99
2009	-16.524
2010	15.967
2011	8.257
2012	-0.996
2013	-1.568
2014	5.303
2015	5.219
2016	5.279
2017	4.675
2018	4.835
2019	4.411
2020	4.2
2021	4
2022	4
2023	4
2024	4