Year	Percent change
1991	14.04
1992	33.025
1993	139.138
1994	255.846
1995	-49.322
1996	4.169
1997	16.996
1998	14.867
1999	71.896
2000	44.678
2001	0.878
2002	28.39
2003	13.055
2004	9.065
2005	20.075
2006	4.752
2007	8.333
2008	9.376
2009	1.3
2010	10.3
2011	15.2
2012	4.3
2013	0.6
2014	3.9
2015	25.1
2016	52.4
2017	9.296
2018	5.441
2019	5.257
2020	5.373
2021	9.297
2022	3.741
2023	3.505
2024	3.465