68% (1999)

73% (1996)

72% (1998)

73% (1995)

51% (2000)

69% (1998)

60% (1999)

44% (2009)

48% (1995)

58% (2000)

67% (1999)

46% (2002)

52% (1996)

58% (2001)

53% (1999)

57% (1999)

61% (2002)

50% (2004)

59% (2000)

80% (1930)