Year	Percent change
1980	4.997
1981	10.042
1982	5.46
1983	-9.819
1984	22.058
1985	3.79
1986	-3.149
1987	2.516
1988	21
1989	21.161
1990	-4.209
1991	-2.245
1992	6.706
1993	5.138
1994	14.591
1995	8.746
1996	7.454
1997	10.837
1998	7.295
1999	8.365
2000	8.001
2001	-5.041
2002	11.032
2003	11.354
2004	15.206
2005	9.45
2006	8.566
2007	13.08
2008	10.609
2009	-8.11
2010	15.506
2011	11.013
2012	5.544
2013	-2.007
2014	-1.369
2015	1.958
2016	0.141
2017	7.73
2018	4.139
2019	1.254
2020	2.424
2021	2.68
2022	2.89
2023	2.891
2024	2.891