49% (1992)

45% (1993)

57% (1988)

69% (2006)

50% (2003)

35% (1987)

38% (1995)

25% (1991)

52% (1995)

33% (1989)

34% (1995)

39% (2008)

46% (2006)

40% (1987)

45% (2007)

34% (2004)

38% (1990)

46% (1990)

38% (1997)

46% (2004)