64% (2008)

56% (2010)

61% (2007)

59% (2007)

60% (2006)

0% (2006)

44% (1999)

68% (1997)

53% (2006)

10% (1997)

52% (2005)

0% (1996)

55% (1985)

0% (2007)

0% (2005)

50% (1987)

0% (2012)

0% (1981)

65% (2006)

70% (2005)