63% (1993)

33% (1978)

63% (1986)

60% (1985)

65% (2001)

61% (1999)

56% (1997)

56% (1987)

52% (1987)

59% (1983)

60% (2006)

73% (1991)

64% (2001)

58% (1989)

55% (2005)

71% (1992)

71% (1991)

73% (1992)

67% (1991)

57% (2014)