47% (1991)

60% (2001)

60% (1997)

54% (2002)

50% (1993)

52% (1999)

54% (1998)

49% (1991)

36% (1995)

57% (2000)

68% (2000)

45% (1995)

58% (1998)

54% (1988)

53% (1993)

45% (1991)

52% (1996)

54% (1997)

54% (1995)

58% (1986)