60% (2011)

55% (1990)

45% (2007)

57% (1988)

55% (1989)

51% (1995)

73% (1993)

54% (2002)

61% (1986)

64% (2012)

61% (1998)

63% (1992)

66% (1989)

60% (1998)

63% (1987)

66% (1997)

39% (2003)

57% (1987)

71% (1989)

57% (1993)