71% (1971)

61% (2010)

68% (1997)

64% (1997)

68% (1998)

59% (1994)

59% (1993)

61% (1998)

55% (1998)

56% (1993)

62% (1993)

58% (1997)

56% (1993)

80% (1976)

50% (1994)

56% (1998)

59% (1998)

46% (1991)

0% (1989)

80% (2023)