Year	Percent change
1980	23.082
1981	10.306
1982	22.944
1983	-12.553
1984	-6.818
1985	-7.088
1986	0.727
1987	1.81
1988	12.621
1989	-2.449
1990	10.617
1991	-5.006
1992	24.65
1993	44.905
1994	21.316
1995	7.877
1996	1.389
1997	18.612
1998	1.123
1999	-23.694
2000	11.056
2001	15.872
2002	-1.43
2003	4.096
2004	9.268
2005	18.672
2006	14.704
2007	17.734
2008	10.379
2009	-10.012
2010	13.331
2011	23.93
2012	7.636
2013	4.075
2014	10.66
2015	-7.34
2016	-11.716
2017	-0.523
2018	6.769
2019	4.511
2020	5.854
2021	3.226
2022	4.186
2023	4.411
2024	4.078