*Release dates can be specified as a specific date, a range of dates, or a
no-later-than (NLT) date. The period (or date) to which data to be released
relate is shown in parentheses.
** Calendar flexibility
indicates that the subscriber is availing itself of a calendar flexibility
option.
Release date note indicates that there is a footnote related to the release
dates of the data category.
Timeliness, Periodicity: indicates that there is a footnote related to
flexibility options taken for the data category