58% (2009)

59% (2009)

20% (2008)

40% (2006)

27% (2009)

52% (2005)

50% (1991)

54% (1991)

90% (1990)

70% (2007)

0% (1992)

0% (1998)

0% (2008)

0% (1999)

0% (1995)

20% (2006)

0% (1996)

0% (1999)

59% (1996)

53% (1996)