Year	Percent change
1980	0.216
1981	11.483
1982	0.4
1983	7
1984	3.2
1985	0.1
1986	13.9
1987	25
1988	44.277
1989	42.886
1990	42.248
1991	46.48
1992	33.697
1993	25.5
1994	51.16
1995	36.8
1996	42.047
1997	69.049
1998	42.105
1999	11.011
2000	11.003
2001	9.219
2002	10.13
2003	9.793
2004	13.285
2005	17.152
2006	23.075
2007	18.55
2008	31.996
2009	16.957
2010	13.34
2011	14.323
2012	10.638
2013	8.107
2014	6.995
2015	5.248
2016	5.433
2017	5.693
2018	7.864
2019	7.817
2020	5.485
2021	4.488
2022	3.49
2023	3
2024	3