Year	%
1993	4.312357954897857
1994	3.9392491799894698
1995	4.050494996968268
1996	3.1172546808875126
1997	1.9346131537908464
1998	2.3482234255022942
1999	3.4446343617506967
2000	3.4495213335293435
2001	3.0877953846994632
2002	3.301822932938832
2003	3.485828840349401
2004	2.9242406090067172
2005	2.9056280599987665
2006	2.5488230459261203
2007	2.606878389130298
2008	2.846981385919666
2009	2.306032610859529
2010	3.545761915053872
2011	3.1744896870136072
2012	2.1800765281858063
2013	1.6640219329592725
2014	-0.459381591769
2015	-0.9484412298049936
2016	0.6221927604370295
2017	1.0691444072900325