73% (1987)

68% (2014)

56% (1998)

57% (2001)

54% (2011)

60% (1984)

75% (1990)

65% (1970)

68% (2002)

40% (1993)

59% (1989)

71% (1987)

44% (1979)

52% (1972)

56% (1994)

65% (1993)

51% (2005)

68% (1986)

67% (1989)

50% (1979)