71% (1992)

76% (1998)

66% (2010)

49% (2008)

60% (1964)

45% (2018)

20% (1990)

47% (2002)

52% (1985)

50% (1982)

61% (1994)

52% (2018)

67% (2002)

41% (2010)

67% (1972)

58% (1997)

64% (2008)

61% (1997)

10% (1991)

57% (1975)