51% (1996)

65% (2001)

46% (1990)

32% (1998)

40% (1995)

50% (1990)

47% (1996)

51% (1993)

53% (1991)

62% (1990)

57% (1996)

52% (1990)

61% (1997)

0% (1995)

47% (1997)

49% (1989)

62% (1991)

56% (1991)

43% (1992)

43% (1993)