The Enhanced Value
1981
1981
1987
1989
1979
1982
1990
1979
1986
1978
1989
1986
1995
1979
1985
1976
1985
1984
1987
1987
1990
1986
1985
1989
1987
1977
1985
1990
1987
1979
1984
1985
1982
1980
1980
1987
1990
1985
1982
2002
1981
1940-1960
1890-1910; (late 20th century)
1992-1999
1986