62% (1996)

53% (2002)

60% (1994)

43% (1987)

58% (1981)

55% (1998)

58% (1987)

51% (1986)

60% (1999)

50% (2004)

42% (2002)

48% (1987)

88% (1989)

57% (1997)

48% (1995)

48% (1993)

51% (1988)

64% (1987)

30% (1989)

100% (1996)