60% (2001)

79% (2003)

64% (1999)

51% (2000)

53% (2003)

0% (1995)

0% (1985)

55% (2001)

60% (1994)

0% (1992)

71% (1997)

42% (1998)

0% (1991)

60% (1989)

0% (1986)

0% (1987)

58% (2004)

50% (1996)

0% (1992)

0% (1990)