Year	Percent Change from Year Ago
1981-01-01	1.6013358694258400
1982-01-01	-1.3094174408293000
1983-01-01	0.6390794577677650
1984-01-01	3.0084564109438600
1985-01-01	3.6735959181715200
1986-01-01	1.8586327899495600
1987-01-01	1.5854781670058200
1988-01-01	3.2775962522764300
1989-01-01	4.3307940533620700
1990-01-01	3.6746256332907100
1991-01-01	-0.9158165714454040
1992-01-01	-0.0437329930052213
1993-01-01	-0.1259835460017990
1994-01-01	1.2697576965626600
1995-01-01	0.4808664443103820
1996-01-01	0.5400275942320930
1997-01-01	2.3401498814896100
1998-01-01	2.9898918430226100
1999-01-01	1.6947198409770600
2000-01-01	3.9368234487137300
2001-01-01	1.3124236612630800
2002-01-01	0.1626129166005320
2003-01-01	0.0395765597890484
2004-01-01	2.7762235009700300
2005-01-01	3.1152455339649800
2006-01-01	3.9886342145906600
2007-01-01	4.1118778103288600
2008-01-01	2.1547018605936700
2009-01-01	-2.2221071120269900
2010-01-01	3.0026991097107600
2011-01-01	1.6928084988558300
2012-01-01	1.0060240891097600
2013-01-01	1.8520397640744500
2014-01-01	2.4492180903966900
2015-01-01	1.3333690826888600
2016-01-01	1.6012235643288100
2017-01-01	1.6166921436913800