Year	Percent change
1982	72.95
1983	125.072
1984	111.458
1985	158.257
1986	62.898
1987	114.534
1988	1722.05
1989	2775.30
1990	7649.73
1991	139.229
1992	56.734
1993	39.48
1994	15.384
1995	10.228
1996	11.84
1997	6.463
1998	6.007
1999	3.726
2000	3.734
2001	-0.127
2002	1.516
2003	2.484
2004	3.481
2005	1.494
2006	1.138
2007	3.928
2008	6.65
2009	0.245
2010	2.076
2011	4.738
2012	2.649
2013	2.86
2014	3.224
2015	4.398
2016	3.235
2017	1.365
2018	2.192
2019	2.166
2020	2.013
2021	2.003
2022	1.972
2023	1.972
2024	1.972