20% (1997)

59% (2012)

65% (2009)

58% (1999)

30% (1976)

0% (2009)

43% (2003)

58% (2006)

70% (2005)

80% (2007)

0% (2013)

80% (2018)

30% (2001)

70% (2004)

20% (2004)

80% (2008)

0% (1970)

35% (2004)

0% (1989)

0% (1970)