44% (2003)

68% (1991)

49% (1970)

50% (1990)

64% (1966)

65% (1989)

70% (1967)

40% (1957)

50% (1953)

0% (1969)

56% (1964)

55% (1959)

60% (1964)

0% (1965)

0% (1970)

50% (1967)

70% (1966)

60% (1962)

0% (1992)

30% (1968)