63% (1993)

36% (1995)

59% (1995)

51% (1990)

40% (1997)

44% (1993)

50% (1995)

48% (1998)

43% (1992)

45% (1996)

33% (2003)

50% (1995)

33% (1998)

30% (1994)

40% (1997)

32% (1989)