76% (1997)

76% (1996)

61% (1993)

63% (1994)

62% (1998)

69% (2022)

77% (1995)

70% (1997)

73% (1994)

64% (1991)

58% (2012)

53% (1992)

62% (1997)

51% (1998)

64% (2003)

65% (1992)

66% (1990)

64% (1991)

70% (2000)

53% (1994)