40% (1999)

20% (2005)

0% (2010)

0% (1996)

0% (2001)

66% (2007)

0% (1993)

62% (2013)

0% (1970)

74% (2020)

10% (2003)

85% (2012)

72% (1991)

86% (1970)

70% (2001)

48% (2005)

30% (1995)

80% (2015)

80% (2020)

0% (2004)