49% (1992)

56% (1988)

35% (1990)

35% (1995)

72% (2006)

36% (1995)

53% (1995)

49% (2007)

37% (1987)

42% (1987)

52% (2003)

35% (2008)

46% (2006)

39% (1990)

36% (2004)

64% (2005)

42% (2008)

49% (1990)

40% (1993)

49% (2004)