Frequencies for first 10,000 rows of assistry variable in sippp08putm1 dataset :

REC: Allocation flag for TSSISTRY |      Freq.     Percent        Cum.
----------------------------------+-----------------------------------
                      Not imputed |      9,973       99.73       99.73
Statistical imputation (hot deck) |          4        0.04       99.77
             Cold deck imputation |          7        0.07       99.84
  Logical imputation (derivation) |         16        0.16      100.00
----------------------------------+-----------------------------------
                            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016