Year	Percent change
1980	40.039
1981	34.884
1982	37.069
1983	76.73
1984	52.63
1985	23.46
1986	46.73
1987	90.37
1988	82.749
1989	104.065
1990	81.295
1991	2154.44
1992	4129.17
1993	1986.90
1994	23773.10
1995	541.801
1996	617
1997	199
1998	29.145
1999	284.9
2000	550
2001	357.28
2002	25.316
2003	12.817
2004	4.001
2005	21.545
2006	12.845
2007	16.672
2008	17.966
2009	46.101
2010	23.464
2011	14.95
2012	0.857
2013	0.876
2014	1.24
2015	0.959
2016	18.2
2017	41.5
2018	29.3
2019	8.4
2020	6.7
2021	5.3
2022	5.1
2023	4.9
2024	3.5