48% (1998)

45% (1993)

38% (1995)

63% (1993)

50% (1995)

44% (1995)

25% (1997)

60% (1995)

45% (1997)

44% (1992)

46% (1996)

32% (1994)

59% (1999)

35% (1998)

51% (1990)

32% (1989)

28% (2003)