The following standard symbols are used in Statistics Canada publications:
. not available for any reference period
.. not available for a specific reference period
… not applicable
0 true zero or a value rounded to zero
0s value rounded to 0 (zero) where there is a meaningful distinction between true zero and the value that was rounded
p preliminary
r revised
x suppressed to meet the confidentiality requirements of the Statistics Act
A excellent
B very good
C good
D acceptable
E use with caution
F too unreliable to be published