65% (1999)

51% (1995)

56% (1989)

56% (2000)

62% (1985)

52% (1994)

57% (1987)

63% (1993)

40% (1996)

57% (1993)

57% (2004)

57% (1990)

53% (1989)

47% (1990)

48% (1995)

46% (1998)

51% (1992)

31% (1994)

62% (1991)

52% (1991)