Year	Percent change
1980	9.169
1981	10.495
1982	2.048
1983	17.569
1984	19.158
1985	1.066
1986	27.847
1987	21.413
1988	4.332
1989	3.716
1990	0.674
1991	13.342
1992	6.853
1993	7.509
1994	6.241
1995	13.442
1996	7.354
1997	10.683
1998	0.396
1999	14.882
2000	19.5
2001	-7.77
2002	12.481
2003	12.368
2004	14.041
2005	5.614
2006	13.382
2007	8.989
2008	1.856
2009	-8.717
2010	25.195
2011	5.201
2012	22.711
2013	0.209
2014	0.738
2015	-1.954
2016	-5.52
2017	6.909
2018	-2.275
2019	-1.1
2020	3.487
2021	1.557
2022	1.415
2023	1.324
2024	1.328