Year	Percent change
1980	1.272
1981	0.11
1982	-0.788
1983	1.555
1984	2.826
1985	2.192
1986	2.417
1987	1.469
1988	3.736
1989	3.913
1990	5.723
1991	5.011
1992	1.51
1993	-0.984
1994	2.532
1995	1.809
1996	0.863
1997	1.907
1998	1.769
1999	1.84
2000	3.195
2001	1.832
2002	0.027
2003	-0.722
2004	0.698
2005	0.878
2006	3.881
2007	3.365
2008	0.815
2009	-5.56
2010	3.939
2011	3.72
2012	0.691
2013	0.602
2014	2.177
2015	1.484
2016	2.157
2017	2.456
2018	1.452
2019	0.754
2020	1.44
2021	1.503
2022	1.44
2023	1.304
2024	1.156