Annual Percent
1977-01-01 33.3502297334590
1978-01-01 31.8316602232090
1979-01-01 31.3549694636529
1980-01-01 31.9490409037194
1981-01-01 32.2623423373615
1982-01-01 32.7783195812982
1983-01-01 32.8476532645557
1984-01-01 32.2710406706923
1985-01-01 31.7351973089583
1986-01-01 31.4009971691917
1987-01-01 31.6033227647317
1988-01-01 31.6286465268164
1989-01-01 31.4069795344369
1990-01-01 32.7013418640361
1991-01-01 33.9689021591433
1992-01-01 33.8651106980741
1993-01-01 33.9288271835701
1994-01-01 33.6008586218911
1995-01-01 33.7402653742975
1996-01-01 34.5035236923431
1997-01-01 34.5730200906275
1998-01-01 34.1300850256804
1999-01-01 34.5231093749685
2000-01-01 34.1943241024539
2001-01-01 35.4712436442200
2002-01-01 36.7136038213055
2003-01-01 38.4422587021634
2004-01-01 38.8571826090304
2005-01-01 39.2208273969223
2006-01-01 39.3857453290619
2007-01-01 40.6120687135271
2008-01-01 41.2233128698758
2009-01-01 43.1408088312161
2010-01-01 44.8340935767376
2011-01-01 45.0310968841770
2012-01-01 45.1191526215838
2013-01-01 44.9511692214416
2014-01-01 44.9920350753182
2015-01-01 45.0025841286789
2016-01-01 44.8349910160969
2017-01-01 44.5337234557519