63% (2012)

63% (1990)

51% (1995)

71% (1989)

50% (1984)

61% (1988)

56% (1996)

64% (2015)

54% (1991)

66% (1992)

66% (1986)

67% (1989)

59% (1998)

61% (1986)

51% (1994)

64% (1990)

57% (1988)

64% (1987)

39% (1999)

54% (1994)