Year	Percent change
1991	71.021
1992	-8.33
1993	-0.34
1994	-3.283
1995	15.995
1996	-26.079
1997	57.121
1998	15.237
1999	-16.059
2000	-16.397
2001	37.673
2002	-2.914
2003	36.711
2004	-20.338
2005	44.097
2006	-24.983
2007	18.917
2008	16.005
2009	-1.72
2010	38.766
2011	9.891
2012	-14.768
2013	-8.041
2014	26.031
2015	16.827
2016	-25.079
2017	-15.768
2018	8.873
2019	13.437
2020	4.435
2021	5.386
2022	10.965
2023	4.534
2024	3.463