60% (1989)

50% (1999)

32% (1995)

52% (1992)

40% (1984)

75% (1998)

45% (2005)

0% (1961)

34% (1999)

0% (2005)

40% (1989)

50% (2003)

64% (1971)

90% (1957)

20% (1978)

40% (2003)

60% (2004)

63% (1997)

57% (1991)

55% (1986)