75% (2001)

63% (1981)

57% (2006)

70% (1990)

63% (1983)

54% (2010)

57% (1995)

60% (2003)

64% (1986)

0% (2005)

0% (1997)

65% (2005)

0% (2006)

0% (2003)

0% (2006)

70% (1995)

0% (2004)

50% (2008)

63% (2000)

30% (2006)