Year Index 2010=1, Trend 1969-01-01 0.480939001989327 1970-01-01 0.502851857272775 1971-01-01 0.540064796781612 1972-01-01 0.586680411254605 1973-01-01 0.627878320163355 1974-01-01 0.691940688968639 1975-01-01 0.750700765589533 1976-01-01 0.761735149467581 1977-01-01 0.797031994453752 1978-01-01 0.827866843842104 1979-01-01 0.863112529168573 1980-01-01 0.893538973983586 1981-01-01 0.913878174189152 1982-01-01 0.956475995614450 1983-01-01 0.948581334639790 1984-01-01 0.919281122751223 1985-01-01 0.934368847111666 1986-01-01 0.943437015306687 1987-01-01 0.940211523265281 1988-01-01 0.922613268417637 1989-01-01 0.903432981708024 1990-01-01 0.927296237248531 1991-01-01 0.968823744491939 1992-01-01 1.006113956331140 1993-01-01 1.013913771488150 1994-01-01 0.972881321366764 1995-01-01 0.958046206228863 1996-01-01 0.959401768925927 1997-01-01 0.973801528198230 1998-01-01 0.988068328928192 1999-01-01 0.984116645700860 2000-01-01 0.963086184791918 2001-01-01 0.995281772318996 2002-01-01 1.020377135993990 2003-01-01 1.035959142371880 2004-01-01 1.014931683297480 2005-01-01 0.988259374575102 2006-01-01 0.973381442534476 2007-01-01 0.960452032892266 2008-01-01 1.013112863083170 2009-01-01 1.035063624745260 2010-01-01 1.000000000000000