57% (1990)

64% (1993)

58% (1988)

67% (1990)

43% (2012)

54% (1989)

54% (1996)

55% (1991)

43% (1995)

69% (1996)

64% (1984)

59% (1992)

55% (1994)

67% (1998)

59% (1995)

43% (2002)

57% (2005)

50% (1988)

53% (1993)

50% (1994)