20% (1989)

45% (2007)

48% (1990)

59% (1989)

63% (1986)

0% (1993)

0% (1998)

61% (1983)

60% (1988)

50% (1986)

46% (1976)

0% (2004)

58% (1984)

70% (1991)

70% (2004)

53% (2002)

47% (2009)

42% (1992)

33% (1987)

0% (1965)