69% (1993)

69% (1986)

68% (1990)

54% (2013)

62% (2013)

71% (2005)

70% (1996)

61% (1996)

67% (2020)

59% (2016)

61% (1986)

53% (1991)

68% (1976)

71% (2001)

70% (1996)

73% (1987)

30% (1969)

73% (1967)

73% (1990)

70% (1988)