Year	Percent change
1980	14.933
1981	-2.52
1982	15.933
1983	22.781
1984	21.354
1985	28.916
1986	-6.746
1987	2.171
1988	-3.253
1989	23.584
1990	1.992
1991	-4.079
1992	5.337
1993	-16.5
1994	-11.018
1995	1.642
1996	7.421
1997	13.767
1998	11.13
1999	8.158
2000	-1.681
2001	-8.416
2002	-5.463
2003	9.267
2004	-0.713
2005	-8.1
2006	12.573
2007	19.154
2008	-1.621
2009	4.009
2010	-3.758
2011	4.03
2012	-1.129
2013	7.065
2014	17.579
2015	17.751
2016	-6.05
2017	-0.312
2018	-4.714
2019	4.847
2020	5.345
2021	5.145
2022	5.342
2023	4.97
2024	5.46