Year	Percent change
1980	0.788
1981	-9.8
1982	-1.9
1983	0.9
1984	1.76
1985	1.156
1986	1.96
1987	1.175
1988	3.407
1989	4.075
1990	3.129
1991	-6.306
1992	1.181
1993	2.1
1994	-0.042
1995	1.679
1996	2.154
1997	3.693
1998	3.917
1999	4.699
2000	4.457
2001	5.98
2002	-12.408
2003	9.785
2004	5.257
2005	4.756
2006	5.399
2007	5.711
2008	7.132
2009	-4.023
2010	0.272
2011	1.446
2012	3.037
2013	2.241
2014	3.33
2015	3.097
2016	4.182
2017	4.307
2018	5.197
2019	5.193
2020	5.259
2021	5.138
2022	4.854
2023	4.837
2024	4.806