63% (1993)

34% (1978)

61% (1985)

77% (2004)

53% (1987)

57% (1997)

64% (2001)

60% (2006)

59% (1983)

58% (1989)

65% (2001)

63% (1986)

64% (1986)

71% (1992)

60% (1992)

90% (1995)

55% (2002)

48% (1999)

77% (2006)

67% (2005)