0% (1995)

70% (2007)

0% (2003)

58% (2006)

65% (2001)

60% (1990)

60% (2000)

50% (1986)

50% (1991)

60% (1990)

0% (2001)

60% (1990)

57% (1990)

0% (2006)

45% (1992)

50% (1991)

50% (1994)

20% (1999)

60% (1989)

0% (1991)