Year Average 1990 = 100 1975-12-31 123.66 1976-12-31 104.32 1977-12-31 111.18 1978-12-31 107.17 1979-12-31 115.29 1980-12-31 134.05 1981-12-31 122.82 1982-12-31 115.4 1983-12-31 116.82 1984-12-31 104.67 1985-12-31 109.18 1986-12-31 94.95 1987-12-31 102.85 1988-12-31 107.5 1989-12-31 94.38 1990-12-31 102.41 1991-12-31 100.07 1992-12-31 87.76 1993-12-31 91.19 1994-12-31 88.54 1995-12-31 83.06 1996-12-31 96.13 1997-12-31 104.38 1998-12-31 99.68 1999-12-31 107.22 2000-12-31 105.43 2001-12-31 107.93 2002-12-31 104.54 2003-12-31 100.58 2004-12-31 101.49 2005-12-31 101.96