Year	Percent change
1980	18.803
1981	7.886
1982	7.466
1983	4.414
1984	17.379
1985	13.801
1986	8.596
1987	8.866
1988	8.722
1989	9.292
1990	-4.049
1991	6.896
1992	6.467
1993	5.417
1994	7.505
1995	7.377
1996	9.084
1997	10.405
1998	9.789
1999	7.23
2000	4.77
2001	3.452
2002	6.098
2003	25.394
2004	5.943
2005	-13.394
2006	25.788
2007	8.13
2008	9.517
2009	-6.629
2010	7.093
2011	8.431
2012	2.388
2013	7.281
2014	7.33
2015	2.885
2016	7.289
2017	6.912
2018	6.992
2019	6.303
2020	5.544
2021	5.516
2022	5.53
2023	5.49
2024	5.52