Year	Percent change
1980	70.034
1981	19.355
1982	-16.713
1983	9.791
1984	0.481
1985	8.126
1986	-21.648
1987	0.347
1988	-8.966
1989	-23.834
1990	-6.412
1991	20.783
1992	13.992
1993	-11.175
1994	14
1995	11.681
1996	14.13
1997	29.108
1998	6.874
1999	18.592
2000	-6.124
2001	0.941
2002	2.198
2003	1.823
2004	8.312
2005	8.71
2006	21.622
2007	12.246
2008	9.658
2009	-8.964
2010	13.584
2011	11.085
2012	7.095
2013	-0.183
2014	5.152
2015	10.667
2016	7.313
2017	0.692
2018	-15.315
2019	-8.966
2020	1.913
2021	4.548
2022	5.562
2023	4.434
2024	5.163