Table:
text: Olga Morozova
Grand Slam singles tournament timeline
Grand Slam singles tournament timeline
Tournament _1966 _1967 _1968 _1969 _1970 _1971 _1972 _1973 _1974 _1975 _1976 Career_SR
Australia A A A A A A QF A A QF A 0 / 2
France A 1R 2R 3R 2R 2R QF 2R F SF A 0 / 9
Wimbledon 1R A 1R 4R 2R 3R 4R QF F QF QF 0 / 10
United States A A A A 3R A QF 3R A 2R 3R 0 / 5
SR 0 / 1 0 / 1 0 / 2 0 / 2 0 / 3 0 / 2 0 / 4 0 / 3 0 / 2 0 / 4 0 / 2 0 / 26

Question: Tell me the 1968 for Olga Morozova, for 1r among Grand Slam singles tournaments.