68% (2015)

56% (2005)

67% (2010)

62% (2018)

62% (2008)

58% (1999)

61% (2004)

65% (2002)

54% (2006)

0% (1970)

50% (2011)

51% (2008)

42% (2005)

57% (2006)

66% (2012)

0% (2010)

53% (2010)

0% (2012)