53% (1993)

60% (1992)

59% (1994)

65% (1990)

68% (1998)

53% (1995)

57% (1993)

62% (1997)

50% (1997)

57% (1994)

56% (1991)

63% (1996)

63% (2007)

59% (1993)

63% (1990)

47% (1991)

48% (1997)

54% (1992)

59% (1995)

58% (1994)