15% (1986)

65% (2002)

60% (1977)

80% (2002)

62% (2001)

46% (1995)

80% (1999)

57% (1994)

44% (1981)

60% (2007)

62% (1985)

52% (1981)

53% (1981)

75% (2013)

60% (1974)

30% (2009)

0% (1979)

48% (2015)

90% (1948)

68% (2000)