66% (1998)

58% (1992)

69% (1987)

59% (2005)

54% (1991)

61% (1997)

58% (1998)

53% (2003)

67% (2000)

41% (2004)

48% (1997)

59% (1999)

57% (2007)

51% (1999)

58% (1999)

60% (1999)

49% (1991)

65% (1986)

55% (1994)

63% (1992)