Annual Percent
1968-01-01 83.8479872578430
1969-01-01 83.7513131757989
1970-01-01 83.8350504873377
1971-01-01 84.3721502661287
1972-01-01 84.3082788406284
1973-01-01 84.6306417187202
1974-01-01 84.4336640001593
1975-01-01 83.6823822166859
1976-01-01 83.4794950613256
1977-01-01 83.0887926791577
1978-01-01 82.8890158361496
1979-01-01 83.0755793863219
1980-01-01 82.9406779839341
1981-01-01 82.8418711141451
1982-01-01 82.7187284901170
1983-01-01 82.5069181564991
1984-01-01 82.0758869523890
1985-01-01 81.5766571121426
1986-01-01 81.2046470096795
1987-01-01 80.7813832872218
1988-01-01 80.8538182459553
1989-01-01 81.0821959969780
1990-01-01 81.5207396899272
1991-01-01 82.0081297505361
1992-01-01 82.3801605697981
1993-01-01 82.3786070135536
1994-01-01 82.0013202854335
1995-01-01 81.8982681455673
1996-01-01 82.1798596211278
1997-01-01 82.5140891613581
1998-01-01 81.7472528586849
1999-01-01 81.1784406127266
2000-01-01 81.0696087530974
2001-01-01 80.5513231005863
2002-01-01 79.9509450440693
2003-01-01 79.9522157375914
2004-01-01 80.0917536750058
2005-01-01 80.5071152171868
2006-01-01 81.0828142510768
2007-01-01 81.8356479399838
2008-01-01 81.7150853249814
2009-01-01 80.3243051670534
2010-01-01 80.2083269996039
2011-01-01 80.5815663247644
2012-01-01 80.3729554770046
2013-01-01 80.8499657303014
2014-01-01 81.6433373124346
2015-01-01 81.9311866768845
2016-01-01 82.6031231805078
2017-01-01 83.0029094996570