Year Average 1990 = 100 1975-12-31 129.39 1976-12-31 126.51 1977-12-31 121.06 1978-12-31 119.81 1979-12-31 119.23 1980-12-31 119.82 1981-12-31 112.5 1982-12-31 104.07 1983-12-31 98.22 1984-12-31 95 1985-12-31 96.32 1986-12-31 98.93 1987-12-31 98.9 1988-12-31 96.87 1989-12-31 95.94 1990-12-31 100.01 1991-12-31 98.33 1992-12-31 101.5 1993-12-31 105.02 1994-12-31 106.07 1995-12-31 109.24 1996-12-31 109.08 1997-12-31 105.56 1998-12-31 106.13 1999-12-31 104.6 2000-12-31 101.17 2001-12-31 101.57