76% (1993)

68% (1992)

72% (1992)

48% (1983)

62% (2007)

65% (2003)

10% (2004)

80% (2002)

60% (2003)

0% (2000)

0% (2003)

0% (1997)

0% (2005)

0% (1997)

0% (2004)