Year	Percent change
1980	4.721
1981	-10.233
1982	-12.49
1983	-4.863
1984	-37.718
1985	-20.222
1986	15.243
1987	7.031
1988	6.358
1989	1.205
1990	8.984
1991	-41.036
1992	93.959
1993	15.834
1994	42.503
1995	21.978
1996	8.701
1997	-1.906
1998	8.548
1999	6.359
2000	7.007
2001	5.303
2002	4.364
2003	23.686
2004	4.885
2005	2.695
2006	15.456
2007	9.155
2008	-6.044
2009	10.546
2010	-13.185
2011	-6.75
2012	9.169
2013	11.57
2014	13.606
2015	16.326
2016	13.553
2017	8.437
2018	6.099
2019	5.385
2020	6.527
2021	5.302
2022	4.767
2023	4.581
2024	4.411