57% (1993)

54% (1989)

59% (1971)

50% (2001)

50% (1989)

20% (2005)

56% (1984)

0% (1978)

35% (1996)

0% (1964)

34% (1999)

60% (1994)

47% (1987)

65% (1977)

10% (2000)

55% (1990)

10% (1992)

0% (1973)

55% (1999)

20% (1978)