63% (1998)

59% (2008)

58% (2003)

62% (2000)

62% (2003)

57% (2000)

62% (1986)

69% (1998)

54% (1998)

58% (1995)

63% (1990)

62% (1997)

61% (2004)

66% (2002)

68% (2002)

61% (1989)

73% (1998)

46% (1987)

69% (1999)

71% (2000)