71% (1971)

62% (2010)

59% (1998)

64% (1997)

68% (1998)

46% (1991)

58% (1997)

59% (1994)

61% (1998)

56% (1993)

54% (1998)

62% (1993)

68% (1997)

59% (1993)

50% (1994)

66% (1926)

56% (1993)

0% (1989)

80% (1976)

55% (1998)