Year	Percent change
1991	6.127
1992	5.966
1993	4.502
1994	4.151
1995	3.555
1996	2.317
1997	1.813
1998	1.699
1999	3.168
2000	2.535
2001	2.747
2002	2.828
2003	2.079
2004	5.041
2005	6.028
2006	12.027
2007	11.253
2008	8.804
2009	0.201
2010	1.721
2011	0.156
2012	0.601
2013	1.443
2014	3.108
2015	3.596
2016	1.617
2017	1.967
2018	3.08
2019	2.135
2020	2.056
2021	2.093
2022	2.114
2023	2.086
2024	2.225