61% (2012)

57% (2009)

62% (2013)

62% (1976)

40% (1996)

60% (2015)

51% (1985)

62% (1979)

68% (1998)

57% (1971)

58% (1982)

36% (1983)

70% (1981)

75% (1972)

30% (2001)

20% (1988)

30% (1989)

57% (1980)

67% (1991)