66% (2007)

52% (2009)

53% (1998)

65% (2006)

59% (2009)

54% (2007)

66% (2004)

60% (2003)

50% (2005)

58% (2009)

70% (2007)

30% (2001)

40% (2004)

40% (2006)

27% (2009)

63% (2000)

20% (2008)

70% (2003)

67% (2011)

60% (2013)