62% (2007)

72% (1992)

65% (2004)

71% (1989)

68% (2004)

57% (1999)

56% (1990)

67% (2003)

54% (1991)

68% (2003)

57% (1998)

51% (1999)

38% (1989)

62% (1995)

59% (1996)

40% (1992)

40% (1997)

0% (1999)