69% (1999)

64% (2008)

63% (2003)

49% (2006)

66% (2005)

60% (1984)

68% (2006)

57% (1996)

15% (1994)

67% (2005)

54% (1960)

60% (1971)

44% (1972)

55% (1983)

52% (2012)

47% (1966)

67% (1977)

48% (1972)

50% (1972)

67% (1974)