63% (1995)

59% (2001)

66% (1997)

62% (2008)

60% (2001)

59% (2008)

63% (2000)

75% (1996)

59% (1989)

69% (1996)

79% (1997)

68% (1997)

63% (1993)

52% (1994)

72% (2003)

64% (1997)

60% (2003)

53% (1996)

72% (1994)

62% (2004)