44% (1985)

42% (2009)

60% (2009)

73% (2004)

0% (1985)

71% (1990)

0% (2000)

54% (2007)

61% (1973)

59% (1987)

69% (1992)

66% (2006)

46% (2010)

100% (1996)

51% (1972)

100% (2006)

67% (2004)

60% (2006)

62% (1986)

53% (2010)