Year	Percent change
1988	14.8
1989	75.871
1990	29.188
1991	10.36
1992	6.003
1993	10.315
1994	5.691
1995	28.75
1996	12.76
1997	8.726
1998	141.884
1999	86.656
2000	10.56
2001	7.523
2002	15.189
2003	12.624
2004	8.663
2005	8.78
2006	4.546
2007	5.738
2008	3.167
2009	3.92
2010	5.774
2011	7.701
2012	4.733
2013	6.649
2014	2.399
2015	0.897
2016	2.487
2017	0.148
2018	1.48
2019	2.9
2020	3.1
2021	3.1
2022	3.1
2023	3.1
2024	3.1