64% (2008)

57% (2010)

61% (2007)

10% (1997)

59% (2007)

53% (2006)

0% (2006)

44% (1999)

60% (2006)

0% (2005)

45% (2004)

0% (1981)

53% (2005)

50% (1987)

68% (1997)

0% (1996)

0% (2012)

0% (2007)

0% (2008)

70% (2005)