43% (1999)

40% (2005)

53% (1997)

30% (2000)

48% (1998)

48% (1999)

49% (2000)

46% (1999)

34% (2002)

24% (1999)

47% (2001)

39% (2002)

40% (2002)

48% (1998)

36% (1998)

44% (1999)

48% (1979)

23% (2000)

34% (2001)

45% (1997)