51% (1994)

63% (2007)

66% (1998)

61% (1997)

48% (1991)

53% (1995)

58% (1994)

52% (1994)

60% (1992)

57% (1991)

65% (1995)

51% (1999)

54% (1992)

62% (1995)

55% (1993)

53% (1992)

55% (1995)

59% (1993)

48% (1995)

59% (1995)