66% (1988)

60% (1990)

60% (1986)

51% (1986)

51% (1967)

60% (1991)

46% (1973)

55% (1988)

48% (1986)

54% (1968)

53% (1966)

48% (1970)

50% (1972)

61% (1966)

44% (1988)

62% (1968)

50% (1976)

0% (1938)

40% (1985)

54% (1988)