20% (1999)

55% (1999)

0% (1997)

35% (2006)

47% (2001)

59% (2002)

0% (1993)

40% (2004)

38% (1999)

38% (2005)

20% (1996)

65% (2001)

65% (2003)

65% (1997)

0% (2011)

60% (1995)

35% (1987)

0% (1999)

70% (1993)

0% (1970)