49% (1992)

57% (1988)

25% (1991)

36% (1987)

38% (1995)

69% (2006)

45% (1993)

54% (1990)

52% (1995)

50% (2003)

47% (2007)

45% (2007)

33% (1989)

46% (2006)

38% (1990)

34% (1995)

38% (1997)

40% (1987)

46% (1990)

49% (1995)