62% (2007)

65% (2004)

73% (1992)

68% (2004)

72% (1989)

59% (1999)

67% (2003)

51% (1999)

52% (1991)

40% (1992)

57% (1998)

65% (1995)

57% (1990)

63% (1992)

68% (2003)

40% (1989)

45% (1997)

64% (1996)

0% (1999)