Year	Percent change
1981	4.558
1982	13.431
1983	13.547
1984	16.591
1985	3.658
1986	8.541
1987	18.896
1988	-1.878
1989	0
1990	-0.734
1991	-0.23
1992	0.751
1993	-4.056
1994	33.786
1995	16.239
1996	0.799
1997	4.627
1998	5.938
1999	-0.477
2000	1.498
2001	4.959
2002	2.362
2003	-0.055
2004	1.008
2005	3.465
2006	2.42
2007	3.441
2008	5.313
2009	0.943
2010	2.569
2011	2.732
2012	2.527
2013	1.652
2014	2.586
2015	1.482
2016	0.292
2017	0.786
2018	1.142
2019	1.192
2020	1.492
2021	2
2022	2
2023	2
2024	2