In response, we have:

1. Archived the predecessors (CIIU 3, 2001m9 to 2019m12) by renaming with an "_I3" specifier, marking metadata as "discontinued", and segregating in the catalog.
2. Created the replacements (CIIU 4).

Notable changes to properties (for full list, see background):

• Industry classification: From CIIU 3 to CIIU 4
• Start date: From 2001m9 to 2015m3

The series reside in the historical catalog: 

• Colombia » Labor and Wages » Employment by industry » Level, from 2015
• Colombia » Labor and Wages » Employment by industry » Discontinued » Level, CIIU 3, 2001 to 2019

References

• Gran encuesta integrada de hogares (GEIH) Mercado laboral (theme page)
• Metodología General Gran Encuesta Integrada De Hogares GEIH (Feb 2020, pdf)
• Población ocupada según su actividad económica y por cuenta propia (theme page)