Year	Percent change
1980	9.4
1981	-5.5
1982	-3.5
1983	-3.4
1984	58.523
1985	4.829
1986	14.76
1987	17.77
1988	7.423
1989	3.605
1990	8.127
1991	3.383
1992	4.334
1993	12.719
1994	6.169
1995	5.66
1996	20.592
1997	11.84
1998	11.614
1999	9.561
2000	-7.75
2001	8.782
2002	0.171
2003	13.958
2004	22.491
2005	17.145
2006	26.663
2007	24.039
2008	26.019
2009	-15.887
2010	30.854
2011	46.627
2012	10.967
2013	1.791
2014	-14.948
2015	0.964
2016	-2.963
2017	9.054
2018	6.383
2019	1.534
2020	5.806
2021	7.155
2022	7.974
2023	7.432
2024	6.884