Annual Percent
1977-01-01 14.2030449793523
1978-01-01 13.9933733118235
1979-01-01 13.9003287493287
1980-01-01 14.2034095219940
1981-01-01 14.5492785524546
1982-01-01 14.8239626495334
1983-01-01 14.9453035124474
1984-01-01 14.7472429849342
1985-01-01 14.6141250378822
1986-01-01 14.5619143761195
1987-01-01 14.5603069941500
1988-01-01 14.5153655621547
1989-01-01 14.1242865459937
1990-01-01 14.4079464728870
1991-01-01 14.9069333842039
1992-01-01 14.8167479822171
1993-01-01 15.1211529415259
1994-01-01 15.7136359579909
1995-01-01 15.7093129376316
1996-01-01 15.7331899222022
1997-01-01 15.7670913855456
1998-01-01 15.7686109222573
1999-01-01 16.0147840471662
2000-01-01 16.0768472534046
2001-01-01 16.5520962760543
2002-01-01 17.0387974164838
2003-01-01 17.8307571081830
2004-01-01 18.0952413383577
2005-01-01 18.1875726831534
2006-01-01 18.0605027952031
2007-01-01 18.3134189611161
2008-01-01 18.5631620396861
2009-01-01 19.6425488941719
2010-01-01 20.4466476359026
2011-01-01 21.1035056986544
2012-01-01 21.1677041923125
2013-01-01 21.3414819078171
2014-01-01 21.5327783896153
2015-01-01 21.5255546641159
2016-01-01 21.2139588390536
2017-01-01 21.0317622889448