Year	Percent change
1980	6.443
1981	8.376
1982	8.331
1983	5.792
1984	5.914
1985	5.679
1986	9.426
1987	3.542
1988	5.146
1989	4.183
1990	-2.486
1991	-9.199
1992	-9.256
1993	-3.169
1994	2.134
1995	6.376
1996	2.235
1997	3.897
1998	3.34
1999	3.07
2000	1.146
2001	4.639
2002	5.267
2003	7.357
2004	9.425
2005	6.507
2006	8.163
2007	8.757
2008	7.819
2009	-2.069
2010	7.313
2011	17.291
2012	12.32
2013	11.649
2014	7.885
2015	2.38
2016	1.168
2017	5.302
2018	6.949
2019	6.25
2020	4.949
2021	5
2022	4.953
2023	5.685
2024	5.462