Year	Percent change
1980	47.059
1981	32.134
1982	123.555
1983	275.579
1984	1281.35
1985	11749.63
1986	273.35
1987	14.579
1988	16.002
1989	15.174
1990	17.12
1991	21.444
1992	12.958
1993	8.526
1994	7.875
1995	10.192
1996	12.43
1997	4.709
1998	7.674
1999	2.161
2000	4.601
2001	1.596
2002	0.923
2003	3.338
2004	4.437
2005	5.4
2006	4.3
2007	6.656
2008	14.009
2009	3.346
2010	2.502
2011	9.883
2012	4.519
2013	5.735
2014	5.765
2015	4.061
2016	3.625
2017	2.82
2018	2.326
2019	2.302
2020	3.592
2021	3.97
2022	4.29
2023	4.476
2024	5