This does NOT correspond to any chronological order within sessions. For the remaining sessions, the order corresponds to the tables published in the yearly Index to the Proceedings. These are chronological within sessions. This coding does not distinguish between countries that are not present, or those that are not voting members of the UNGA at any given time. Moreover, because 'no' votes have become somewhat of a rarity, 'abstentions' are often the only way in which countries express discontent with a resolution.
Abstention is therefore difficult to interpret as indifference.
Absences cannot be given any uniform interpretation, and should thus be treated as missing values in most analyses.