Year	Percent change
1991	8.302
1992	-7.17
1993	17.747
1994	-42.525
1995	34.843
1996	47.895
1997	15.136
1998	17.006
1999	-17.645
2000	-5.077
2001	13.705
2002	14.921
2003	2.472
2004	-9.854
2005	1.597
2006	7.573
2007	12.647
2008	7.234
2009	-3.451
2010	-4.382
2011	-12.736
2012	20.677
2013	-0.294
2014	2.311
2015	-10.992
2016	-12.95
2017	6.073
2018	-14.981
2019	-8.083
2020	14.183
2021	11.231
2022	6.722
2023	9.531
2024	3.917