I guess: about 60-75 years old and older.
The average life expectancy of a woman born in 1936 was around 63 years.
The average life expectancy for a woman in the United States is 69 years.
65
44
85
The life expectancy of a male in the US in 1975 was around 68.2 years.
83
43
57
The life expectancy was about age 83.
Man= about 67 woman=80