61% (2007)

49% (2008)

58% (2005)

45% (2011)

33% (1993)

47% (2007)

65% (2007)

45% (2007)

60% (2009)

67% (2006)

69% (2008)

42% (2007)

51% (2007)

59% (1995)

62% (2005)

59% (2005)

55% (2005)

70% (2007)

57% (2007)

64% (2006)