Year	Percent Change from Year Ago
1971-01-01	7.07549095659983
1972-01-01	3.82635552505150
1973-01-01	7.77281991957252
1974-01-01	2.33592312410550
1975-01-01	8.70419392970713
1976-01-01	-1.55993934845539
1977-01-01	7.57555719786846
1978-01-01	11.66376199532840
1979-01-01	7.59267414449655
1980-01-01	7.83273944238455
1981-01-01	5.11138772753409
1982-01-01	9.01936210211038
1983-01-01	10.76818159676550
1984-01-01	15.19287938222310
1985-01-01	13.43073328650400
1986-01-01	8.94909549852753
1987-01-01	11.65778539764920
1988-01-01	11.22303591338290
1989-01-01	4.20602011347721
1990-01-01	3.91976664247795
1991-01-01	9.26245380143289
1992-01-01	14.22489819687050
1993-01-01	13.88364863795400
1994-01-01	13.03646577414620
1995-01-01	10.95408027587860
1996-01-01	9.92262146368492
1997-01-01	9.23686493329895
1998-01-01	7.84595473978812
1999-01-01	7.66152985813492
2000-01-01	8.49001585079000
2001-01-01	8.33574709666865
2002-01-01	9.13365170708462
2003-01-01	10.03803804669340
2004-01-01	10.11367066741490
2005-01-01	11.39458128664710
2006-01-01	12.72098010398310
2007-01-01	14.23084409633640
2008-01-01	9.65066555885301
2009-01-01	9.39873590025138
2010-01-01	10.63588657791680
2011-01-01	9.53915222347726
2012-01-01	7.85675305721396
2013-01-01	7.75841116841354
2014-01-01	7.29486831810867
2015-01-01	6.90019255774250
2016-01-01	6.71985189137443