74% (2009)

53% (2007)

45% (2008)

65% (1996)

54% (1996)

57% (2006)

53% (1997)

10% (2013)

0% (1997)

55% (1994)

0% (1989)

60% (2008)

60% (1994)

40% (2001)

0% (2003)