Year	Percent change
1980	4.601
1981	5.91
1982	5.353
1983	5.581
1984	5.76
1985	4.643
1986	5.534
1987	9.519
1988	13.288
1989	12.194
1990	11.623
1991	8.403
1992	9.23
1993	8.675
1994	7.997
1995	8.12
1996	5.652
1997	-2.754
1998	-7.634
1999	4.572
2000	4.456
2001	3.444
2002	6.149
2003	7.189
2004	6.289
2005	4.188
2006	4.968
2007	5.435
2008	1.726
2009	-0.691
2010	7.514
2011	0.84
2012	7.243
2013	2.687
2014	0.984
2015	3.134
2016	3.356
2017	4.024
2018	4.129
2019	3.471
2020	3.546
2021	3.495
2022	3.495
2023	3.556
2024	3.649