54% (2004)

65% (1986)

10% (1993)

56% (1988)

20% (1994)

20% (1985)

48% (1984)

64% (2002)

58% (1971)

35% (1971)

60% (1989)

45% (1990)

50% (2006)

62% (1997)

51% (1992)

39% (2004)

45% (1999)

48% (1993)

57% (2005)

45% (1998)