60% (2001)

55% (1995)

59% (2002)

50% (2005)

50% (1998)

52% (1997)

53% (2001)

50% (1993)

45% (2000)

35% (1996)

49% (2001)

55% (1999)

46% (1987)

43% (1999)

62% (1995)

59% (1990)