Year	Percent Change from Year Ago
1981-01-01	8.525606662816390
1982-01-01	-0.520808041863225
1983-01-01	-3.486421803624520
1984-01-01	3.410814135326450
1985-01-01	2.187693116470230
1986-01-01	-3.078955375263080
1987-01-01	1.722439311648190
1988-01-01	1.283260997404870
1989-01-01	4.105509330594270
1990-01-01	5.175768386195300
1991-01-01	4.214754839125800
1992-01-01	3.541102415564570
1993-01-01	3.413548773954470
1994-01-01	4.941080670525850
1995-01-01	-6.291230823444630
1996-01-01	6.773258687117370
1997-01-01	6.846852293318820
1998-01-01	5.163925150188340
1999-01-01	2.753554264502320
2000-01-01	4.942453714473690
2001-01-01	-0.404390130543312
2002-01-01	-0.039844485350324
2003-01-01	1.446382679876440
2004-01-01	3.920590822072020
2005-01-01	2.307807062148760
2006-01-01	4.495077897814570
2007-01-01	2.291445710773480
2008-01-01	1.143584597299220
2009-01-01	-5.285744139619720
2010-01-01	5.118118128786990
2011-01-01	3.663007946470860
2012-01-01	3.642322679060900
2013-01-01	1.354091964503680
2014-01-01	2.804340118821070
2015-01-01	3.287991581304750
2016-01-01	2.897859581223930
2017-01-01	2.041469628767250