I computed the variable of telework due to covid “COVIDTELEW”

using 2020 ATUS data and got the following results.

Yes 15%

No 29%

NIU 56%

How do I interpret the results? or interpret the result of NIU. I say some suggestions to drop NIU for CPS data. If I should drop NIU, can I use the code “where COVIDTELEW<99.” Any advice would be greatly appreciated

Thank you!

Guang