Year	Percent change
1980	8.576
1981	15.97
1982	8.19
1983	14.288
1984	8.204
1985	4.156
1986	26.817
1987	21.78
1988	11.662
1989	-3.567
1990	4.592
1991	12.388
1992	12.843
1993	9.589
1994	16.563
1995	23.067
1996	11.337
1997	18.828
1998	14.253
1999	13.078
2000	17.172
2001	-2.285
2002	13.031
2003	13.892
2004	20.622
2005	7.816
2006	12.084
2007	12.656
2008	7.496
2009	-0.325
2010	12.697
2011	15.134
2012	5.086
2013	4.26
2014	2.03
2015	-0.131
2016	2.561
2017	1.903
2018	4.196
2019	2.82
2020	2.555
2021	3.804
2022	3.641
2023	3.509
2024	3.517