59% (1995)

62% (1993)

51% (1990)

33% (1995)

42% (1992)

44% (1993)

49% (1995)

45% (1996)

40% (1997)

30% (1994)

33% (2003)

50% (1995)

32% (1989)

48% (1998)

33% (1998)

40% (1997)