69% (1999)

64% (2008)

49% (2006)

63% (2003)

57% (1996)

15% (1994)

68% (2006)

52% (2012)

44% (1972)

54% (1960)

55% (1983)

67% (2005)

60% (1971)

67% (1974)

50% (2000)

50% (1972)

60% (1984)

47% (1966)

61% (1964)

66% (2005)