Year	Percent change
1981	14.41
1982	11.538
1983	10.626
1984	18.65
1985	18.211
1986	8.895
1987	16.253
1988	17.849
1989	8.642
1990	10.985
1991	9.556
1992	8.567
1993	13.199
1994	13.815
1995	10.134
1996	5.763
1997	7.553
1998	7.822
1999	5.111
2000	9.098
2001	10.784
2002	11.486
2003	4.657
2004	3.226
2005	7.6
2006	4.799
2007	9.808
2008	12.904
2009	4.501
2010	4.5
2011	7.763
2012	8.265
2013	4.419
2014	6.169
2015	4.91
2016	8.682
2017	4.706
2018	5.251
2019	5.184
2020	5.8
2021	5.2
2022	5.7
2023	5.4
2024	5.375