BUG: describe_export_task PercentProgress seems rounded to the nearest integer, leading to 100% not necessarily meaning `COMPLETE`

This is more of a bug report, either in the describe_export_tasks API (docs): the PercentProgress attribute in the response is an integer, and it seems rounded to the nearest integer, leading to PercentProgress = 100 not necessarily meaning that the export is complete.

This might be ok, but:

• at the very least it would be good for the documentation to mention this explicitly
• it might be safer to FLOOR than to ROUND here