68% (2004)

65% (2018)

55% (2014)

56% (2017)

48% (2010)

53% (2017)

62% (2015)

56% (2011)

43% (2002)

62% (1995)

48% (2018)

74% (2001)

61% (2002)

13% (2008)

0% (1970)

51% (2016)

0% (2001)

20% (2008)

35% (2014)

50% (2009)