60% (2008)

77% (2010)

69% (2000)

63% (1999)

59% (2000)

44% (1995)

70% (2000)

63% (1986)

69% (1993)

49% (1994)

69% (1999)

65% (1999)

61% (2000)

40% (1996)

67% (1998)

44% (1998)

60% (1990)

58% (1995)

51% (1990)

55% (1998)