60% (1999)

69% (2006)

68% (1999)

56% (2004)

62% (1997)

57% (2001)

55% (2010)

58% (1999)

69% (2003)

59% (2000)

50% (2000)

67% (2005)

66% (1999)

58% (1998)

0% (1970)

68% (2012)