Year Average 1990 = 100 1975-12-31 92.95 1976-12-31 104.11 1977-12-31 106.46 1978-12-31 108.47 1979-12-31 107.98 1980-12-31 104.3 1981-12-31 100.26 1982-12-31 91.73 1983-12-31 88.78 1984-12-31 90.01 1985-12-31 91.98 1986-12-31 96.91 1987-12-31 98.3 1988-12-31 95.83 1989-12-31 98.84 1990-12-31 101.18 1991-12-31 101.38 1992-12-31 105.02 1993-12-31 102.97 1994-12-31 106.8 1995-12-31 109.07 1996-12-31 105.05 1997-12-31 101.99 1998-12-31 103.55 1999-12-31 99.56 2000-12-31 99.27 2001-12-31 98.97