61% (1997)

60% (1994)

38% (1997)

63% (1995)

60% (2003)

30% (1992)

52% (1991)

63% (1995)

70% (1992)

43% (1999)

40% (1998)

40% (2004)

85% (2003)

60% (1991)

33% (2002)

70% (1991)

0% (1995)

40% (2000)

30% (2000)

65% (1998)