64% (2008)

57% (2010)

52% (2005)

60% (2007)

60% (2006)

68% (1997)

59% (2007)

42% (1999)

0% (2006)

0% (1997)

53% (2006)

10% (1997)

0% (2007)

55% (1985)

0% (1981)

0% (2012)

65% (2006)

70% (2005)

0% (2008)

45% (2004)