30% (2003)

31% (2005)

34% (2000)

54% (2005)

35% (2000)

45% (2012)

47% (2001)

46% (2002)

24% (2001)

50% (1996)

27% (1994)

59% (2003)

21% (1997)

10% (1999)

20% (2002)