70% (2020)

41% (1994)

48% (2009)

35% (2003)

52% (2012)

60% (2014)

69% (2008)

47% (2014)

40% (1975)

55% (2003)

59% (2002)

55% (1997)

66% (2010)

40% (2014)

40% (2013)

69% (2004)

58% (2011)

55% (2014)

44% (2015)

0% (1990)