86% (1992)

60% (2008)

80% (1987)

30% (2007)

0% (2005)

40% (2001)

26% (1997)

72% (2007)

53% (2004)

0% (2007)

60% (2004)

65% (2003)

37% (1986)

80% (2005)

60% (2003)

70% (2007)

100% (2007)

52% (2007)

60% (2005)

83% (2007)