62% (1993)

33% (1995)

60% (1995)

44% (1993)

50% (1990)

43% (1992)

47% (1995)

45% (1996)

49% (1995)

48% (1998)

33% (1998)

32% (1989)

25% (1994)

33% (2003)

43% (1997)

40% (1997)