61% (1967)

60% (1964)

0% (1968)

20% (1968)

0% (1969)

57% (1967)

50% (1960)

50% (1969)

50% (1962)

60% (1965)

60% (1962)

0% (1966)

0% (1963)

50% (1960)

20% (1965)

60% (1950)

45% (1969)

70% (1965)

40% (1960)

50% (1966)