Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

1960

N/A

N/A

N/A

YES

YES

YES

YES

YES

N/A

N/A

N/A

N/A

1961

N/A

N/A

YES

YES

YES

YES

YES

N/A

N/A

N/A

N/A

N/A

1962

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

1963

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

1964

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

N/A

N/A

1965

YES

YES

YES

YES

YES

YES

YES

YES

N/A

YES

YES

YES

1966

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

1967

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

1968

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

1969

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES