Year	Percent change
1980	7.444
1981	6.942
1982	5.941
1983	6.25
1984	7.762
1985	-0.876
1986	1.153
1987	5.389
1988	9.938
1989	9.06
1990	9.007
1991	9.547
1992	8.886
1993	9.896
1994	9.211
1995	9.83
1996	10.002
1997	7.327
1998	-7.359
1999	6.131
2000	8.671
2001	0.518
2002	5.391
2003	5.789
2004	6.783
2005	4.976
2006	5.584
2007	6.299
2008	4.832
2009	-1.514
2010	7.528
2011	5.294
2012	5.473
2013	4.694
2014	6.007
2015	5.092
2016	4.223
2017	5.897
2018	4.724
2019	4.66
2020	4.8
2021	4.84
2022	4.84
2023	4.84
2024	4.84