Year	Percent change
1980	11.712
1981	9.17
1982	-1.398
1983	-3.043
1984	2.817
1985	3.872
1986	0.263
1987	4.072
1988	5.881
1989	5.817
1990	4.12
1991	3.49
1992	1.696
1993	4.936
1994	5.318
1995	6.823
1996	1.574
1997	4.243
1998	0.068
1999	-1.366
2000	-2.314
2001	-0.834
2002	-0.021
2003	4.321
2004	4.057
2005	2.133
2006	4.807
2007	5.422
2008	6.359
2009	-0.258
2010	11.144
2011	4.249
2012	-0.539
2013	8.417
2014	4.861
2015	3.08
2016	4.313
2017	4.958
2018	3.723
2019	3.49
2020	3.998
2021	3.995
2022	3.993
2023	4.041
2024	4.022