48% (1995)

49% (1994)

44% (1991)

57% (1995)

40% (1995)

53% (1995)

48% (1991)

44% (1992)

44% (1997)

50% (1995)

49% (1990)

53% (1991)

49% (1997)

77% (1997)

40% (1994)

35% (1988)

47% (1987)

40% (1996)

34% (2002)

30% (1993)