42% (2008)

40% (1997)

62% (2008)

68% (2012)

56% (2007)

62% (2006)

55% (1992)

75% (2009)

43% (2005)

52% (2011)

0% (1993)

50% (1997)

46% (2003)

41% (1994)

20% (1999)

55% (2007)

10% (2007)

0% (1970)

66% (1978)

0% (2004)