What year did Chairman Mao die?
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1976
1979
1976
1979
1976
1979
1976
1979
1979
1979
1979
1979
1978
1979
1975
1978
1979
1975
1978
1979
1975
1978
1979
1975
1978
1979
1975
1978
1979
1975
1978
1979
1975
1978
1980
1979
1975
1978
1980
1979
1975
1978
1980
1979
1975
1978
1980
1979
1975
1978
1980
1979
1975
1978
1980
1977
1975
1978
1980
1977
1975
1978
1980
1977
1975
1978
1980
1977
1975
1978
1980
1977
1975
1978
1980
1966
1977
1975
1978
1980
1966
1977
1975
1982
1978
1980
1987
1966
1977
1975
1989
1982
1980
1987
1966
1977
1974
1989
1970
1983
1982
1981
1980
1987
1966
1977
1974
1989
1970
1983
1982
1981
1980
1987
1966
1977
1972
1976.
1974
1989
1970
1983
751
1982
1971
1981
1980
1987
1966
1977
1972
1974
1989
1970
1983
1982
1976.
1971
751
1981
1980
1987
1966
1977
1972
1973
1974
1989
1984
1970
1983
1982
1968
1971
1981
1980
1987
1976.
1966
1977
1972
751
1986
1973
1974
1989
1984
1970
1983
1982
1968
1971
776
1981
1980
1987
783
1976.
751
776
768
783
1976.
751