61% (1997)

61% (1994)

63% (1995)

64% (1995)

33% (1992)

52% (1991)

38% (1997)

40% (1998)

70% (1992)

70% (1991)

60% (1991)

40% (2000)

30% (2000)

40% (2004)

60% (2003)

0% (1995)

65% (1998)

85% (2003)

43% (1999)

33% (2002)