Year	Percent change
1981	5.349
1982	3.54
1983	6.669
1984	6.635
1985	5.208
1986	-2.226
1987	4.749
1988	6.452
1989	1.21
1990	-5.343
1991	-13.877
1992	2.102
1993	-10.139
1994	13.72
1995	36.499
1996	9.202
1997	22.755
1998	15.544
1999	11.798
2000	24.945
2001	8.822
2002	5.725
2003	6.257
2004	17.917
2005	12.874
2006	19.53
2007	16.12
2008	6.908
2009	-11.4
2010	11.304
2011	6.546
2012	-1.794
2013	4.18
2014	9.089
2015	7.208
2016	5.073
2017	4.72
2018	4.746
2019	3.958
2020	4.567
2021	6.224
2022	6.429
2023	5.703
2024	5.376