69% (2003)

20% (2009)

39% (2006)

58% (1996)

63% (2001)

20% (2004)

58% (2002)

40% (2006)

55% (2011)

58% (2002)

75% (1997)

46% (2000)

57% (1997)

47% (2009)

65% (2012)

50% (1999)

65% (2004)

71% (2000)

58% (1997)

62% (2005)