61% (2002)

67% (1995)

61% (2002)

58% (1998)

75% (1997)

51% (1990)

49% (1991)

62% (2001)

60% (2001)

59% (1999)

42% (1998)

49% (2003)

71% (1993)

63% (1992)

50% (1998)

70% (2005)

50% (2002)

60% (1987)

57% (1991)

68% (2005)