49% (1994)

63% (1993)

62% (1992)

64% (1991)

58% (1996)

63% (1994)

73% (1990)

67% (1992)

52% (1992)

40% (1989)

58% (1995)

52% (1992)

47% (1993)

62% (1990)

73% (1990)

51% (1991)

42% (1991)

47% (1991)

45% (1994)

0% (1991)