65% (2008)

58% (2004)

59% (1999)

70% (2006)

57% (2006)

62% (2001)

71% (2001)

54% (2003)

67% (1995)

60% (1970)

62% (2000)

72% (2005)

83% (1989)

56% (2000)

60% (2007)

0% (1984)

50% (2012)

69% (1972)

57% (2008)

0% (1987)