Year	Percent change
1987	3.319
1988	11.073
1989	12.588
1990	5.587
1991	9.186
1992	2.731
1993	4.758
1994	7.69
1995	4.571
1996	2.271
1997	11.367
1998	11.173
1999	14.251
2000	17.131
2001	5.837
2002	2.611
2003	2.824
2004	10.747
2005	5.543
2006	13.129
2007	8.106
2008	5.472
2009	-11.642
2010	10.372
2011	4.046
2012	2.752
2013	5.264
2014	16.384
2015	5.259
2016	3.805
2017	-1.897
2018	5.656
2019	5.47
2020	4.557
2021	4.088
2022	4.065
2023	3.937
2024	3.953