Year	Percent
1988-01-01	60.281782633353600
1989-01-01	80.788140643623400
1990-01-01	33.001977831802500
1991-01-01	57.595284750566400
1992-01-01	69.583636399379300
1993-01-01	48.108166068706800
1994-01-01	15.176347431344100
1995-01-01	45.365308362185600
1996-01-01	50.734054961211900
1997-01-01	49.100923576953000
1998-01-01	8.013755189656030
1999-01-01	-2.086305132235280
2000-01-01	8.636320949302810
2001-01-01	3.348122655271080
2002-01-01	3.300121752837490
2003-01-01	-3.502585511034180
2004-01-01	0.883302696930943
2005-01-01	3.329199228028530
2006-01-01	1.954737176289170
2007-01-01	4.617437722419990
2008-01-01	10.460073135470600
2009-01-01	-1.651397336207750
2010-01-01	2.517851401717020
2011-01-01	5.046102263202020
2012-01-01	2.130545802744970
2013-01-01	1.207125556684130
2014-01-01	-1.509244605705040
2015-01-01	1.404608872864110
2016-01-01	1.575302229230430
2017-01-01	1.362148999315100