Year	Percent change
1980	5.14
1981	17.471
1982	17.673
1983	11.872
1984	17.202
1985	10.794
1986	6.035
1987	12.863
1988	12.126
1989	29.552
1990	-2.785
1991	-1.928
1992	10.907
1993	9.52
1994	14.531
1995	18.895
1996	4.015
1997	8.385
1998	17.817
1999	6.447
2000	0.234
2001	6.495
2002	1.43
2003	5.53
2004	6.593
2005	9.756
2006	3.522
2007	12.216
2008	2.6
2009	16.289
2010	13.672
2011	6.78
2012	6.091
2013	7.469
2014	9.125
2015	17.856
2016	12.662
2017	11.762
2018	9.002
2019	5.041
2020	4.802
2021	6.628
2022	7.028
2023	7.243
2024	7