primary_input_get(), iotable_get()
Other iotables processing functions:
conforming_vector_create(),
empty_remove(),
household_column_find(),
household_column_get(),
iotable_year_get(),
key_column_create(),
matrix_round(),
primary_input_get(),
rows_add(),
supplementary_add(),
total_tax_add(),
vector_transpose_longer(),
vector_transpose_wider()