60% (1997)

60% (2001)

48% (1991)

50% (1993)

54% (1999)

57% (2000)

54% (2002)

36% (1995)

50% (1993)

53% (1998)

51% (1989)

51% (1996)

47% (1995)

54% (1997)

54% (1988)

66% (2000)

45% (1991)

58% (1986)

54% (1995)

48% (1987)