30% (2007)

0% (2005)

35% (2001)

60% (1997)

40% (2012)

12% (1998)

72% (2014)

50% (2004)

90% (1978)

67% (2010)

84% (2003)

0% (2007)

15% (2009)

40% (2001)

70% (1998)

0% (2010)

20% (2013)

20% (1999)

0% (2009)

50% (2015)