50% (1992)

77% (2003)

60% (1989)

98% (1991)

71% (1986)

47% (1993)

55% (1987)

60% (1970)

39% (1991)

55% (2001)

45% (1998)

45% (1993)

46% (1988)

53% (1988)

40% (2003)

60% (1984)

42% (1995)

51% (1990)

56% (1990)

52% (1993)