71% (1998)

69% (2009)

75% (1978)

73% (2003)

73% (1975)

67% (1959)

75% (1990)

36% (1968)

60% (2015)

45% (1966)

71% (1964)

50% (1960)

70% (2001)

30% (1952)

66% (1989)

77% (2015)

58% (2016)

55% (2014)

73% (2007)

67% (1986)