Year	Percent
1991	-7.34479
1992	2.20107
1993	3.47468
1994	5.07086
1995	6.8068
1996	5.97593
1997	6.38989
1998	4.57725
1999	4.6509
2000	5.65725
2001	1.27594
2002	2.08888
2003	3.63239
2004	5.19719
2005	3.53915
2006	6.24691
2007	7.09294
2008	4.2355
2009	2.75061
2010	3.90326
2011	4.96078
2012	1.60815
2013	1.45311
2014	3.36048
2015	3.91382
2016	2.90855
2017	4.53455