Year	Percent change
1980	23.568
1981	2.491
1982	-6.906
1983	27.157
1984	-17.356
1985	20.406
1986	17.786
1987	10.544
1988	9.176
1989	8.469
1990	10.1
1991	18.62
1992	21.441
1993	4.645
1994	-3.99
1995	3.405
1996	4.81
1997	2.721
1998	8.781
1999	-5.3
2000	14.642
2001	10.067
2002	10.534
2003	8.978
2004	2.784
2005	15.36
2006	9.006
2007	0.596
2008	1.47
2009	-3.025
2010	0.74
2011	6.962
2012	0.056
2013	5.631
2014	1.618
2015	2.236
2016	-4.391
2017	-4.317
2018	10.134
2019	2.499
2020	6.312
2021	3.93
2022	3.399
2023	2.532
2024	3.269