The geographic change appears in the data, although there is no specific mention of it.
In response, we have:
Figures are thousands of persons (Ths. #) or percent rate (%). The successor areas sum to the predecessor area.
The series reside in the historical catalog (Panama » Labor and Wages » Labor force status) and include, for example:
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.
References
See also