65% (1986)

54% (2004)

56% (1988)

48% (1984)

10% (1993)

69% (1998)

64% (2002)

39% (2004)

45% (1990)

20% (1985)

46% (1969)

40% (2002)

48% (1993)

57% (2005)

48% (2011)

62% (1997)

50% (2006)

30% (1999)

39% (1998)

35% (2004)