67% (2006)

56% (2009)

53% (2011)

66% (2012)

73% (2017)

52% (1999)

30% (2001)

100% (1999)

68% (2000)

30% (1998)

55% (1995)

78% (1983)

70% (2002)

50% (1970)

0% (2014)

60% (1987)

10% (1970)

0% (1970)