The source erroneously reported these series as having specific zero values, but has now disambiguated to indicate "no data". Data Buffet policy is to omit time series that potentially exist within a family, but which contain no data.
In response, we have:
If you have legacy retrievals, subsequent use will elicit a "series not found" error.
The remaining series reside in the historical catalog:
One such deleted series was:
See also