73% (1999)

52% (1991)

60% (1995)

54% (1991)

72% (1987)

60% (2000)

63% (2000)

37% (2003)

58% (1990)

52% (1997)

60% (2004)

51% (2002)

49% (1985)

65% (2006)

54% (2002)

55% (1986)

55% (1991)

58% (2000)

66% (2001)

55% (1999)