50% (2012)

40% (2007)

27% (1995)

65% (2001)

38% (2005)

65% (2003)

0% (1997)

35% (2006)

59% (2002)

38% (1999)

0% (1993)

65% (1997)

40% (2004)

20% (1996)

60% (1995)

35% (1987)

0% (2011)

0% (1970)

0% (1999)

70% (1993)