We have changed the geo code from the pattern used for NUTS 1 (IEST_^^^^) to NUTS 3 (IEST_^^^):

• IEST_UNKN » IEST_UNK

The series reside in the historical catalog (Estonia » Demographics » Population » Annual » By sex and age) and changes include, for example (old » new):

• VSQPOPTUA.IEST_UNKN    » VSQPOPTUA.IEST_UNK    = Vital statistics: Population - Both sexes - All ages, (#)
• VSQPOP3539UA.IEST_UNKN » VSQPOP3539UA.IEST_UNK = Ages 35 to 39 years, (#)

Because catalog locations are subject to change, the upper-right search box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.