69% (1999)

73% (1996)

51% (2000)

72% (1998)

73% (1995)

44% (2009)

58% (2000)

69% (1998)

66% (1999)

46% (2002)

60% (1999)

50% (2004)

51% (1996)

53% (1999)

58% (2001)

48% (1995)

57% (1999)

59% (2000)

61% (2002)

80% (1930)