61% (1995)

67% (1994)

60% (1958)

68% (1989)

64% (1995)

55% (1996)

64% (1987)

68% (1990)

52% (1988)

58% (1993)

70% (1988)

64% (1995)

61% (1992)

48% (1994)

55% (1987)

62% (1994)

58% (1990)

67% (1991)

63% (1994)

54% (1992)