Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.
Description
Source of information
1j. what month and year did this person enter the u.s. to stay?
Imputation and derivation
Imputation
1j. what month and year did this person enter the u.s. to stay?
Others
Security
1j. what month and year did this person enter the u.s. to stay?