Year Average 1990 = 100 1975-12-31 94.88 1976-12-31 98.06 1977-12-31 103.75 1978-12-31 106.78 1979-12-31 107.54 1980-12-31 106.94 1981-12-31 102.11 1982-12-31 93 1983-12-31 90.95 1984-12-31 89.59 1985-12-31 90.36 1986-12-31 94.47 1987-12-31 97.66 1988-12-31 96.46 1989-12-31 95.81 1990-12-31 100 1991-12-31 99.9 1992-12-31 101.94 1993-12-31 103.23 1994-12-31 105.11 1995-12-31 109.28 1996-12-31 106.97 1997-12-31 102.63 1998-12-31 102.68 1999-12-31 101.39 2000-12-31 98.47 2001-12-31 98.94