75% (1984)

52% (1983)

10% (1992)

56% (1978)

54% (1967)

59% (1977)

35% (1996)

60% (1978)

57% (1997)

57% (1978)

48% (2004)

60% (1954)

45% (2003)

21% (1979)

70% (1983)

63% (1985)

35% (1992)

80% (1965)

51% (1974)

35% (1989)