Year	Percent change
1987	7.306
1988	10.451
1989	9.148
1990	4.999
1991	9.129
1992	-3.095
1993	5.222
1994	6.711
1995	4.235
1996	5.387
1997	12.605
1998	11.812
1999	14.816
2000	15.012
2001	6.614
2002	1.075
2003	4.695
2004	11.605
2005	5.764
2006	12.384
2007	6.737
2008	9.235
2009	-13.677
2010	12.172
2011	5.334
2012	4.761
2013	5.098
2014	19.467
2015	4.334
2016	4.453
2017	-2.172
2018	5.488
2019	6.51
2020	4.875
2021	4.282
2022	4.252
2023	4.108
2024	4.105