Year	Percent change
1981	1.833
1982	1.833
1983	1.833
1984	1.833
1985	1.833
1986	1.833
1987	1.833
1988	1.833
1989	1.833
1990	1.833
1991	175.72
1992	495.793
1993	1837.87
1994	971.954
1995	3783.92
1996	1650.83
1997	149.621
1998	134.809
1999	329.001
2000	268.35
2001	116.068
2002	105.59
2003	76.56
2004	31.013
2005	18.53
2006	12.207
2007	11.776
2008	13.17
2009	13.987
2010	15.322
2011	11.376
2012	9.042
2013	7.687
2014	7.498
2015	12.091
2016	41.125
2017	23.667
2018	18.604
2019	14.996
2020	9
2021	7
2022	6
2023	6
2024	6