Year	Percent
1999-12-31	3.338
2000-12-31	4.855
2001-12-31	3.294
2002-12-31	2.865
2003-12-31	2.124
2004-12-31	2.154
2005-12-31	2.488
2006-12-31	3.725
2007-12-31	4.684
2008-12-31	2.892
2009-12-31	0.7
2010-12-31	1.006
2011-12-31	1.356
2012-12-31	0.187
2013-12-31	0.287
2014-12-31	0.078
2015-12-31	-0.131
2016-12-31	-0.319
2017-12-31	-0.329
2018-12-31	-0.309
2019-12-31	-0.383