Frequencies for first 10,000 rows of whocomp variable in nhamcsopd2000 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         Hospital staff |      4,714       47.14       47.14
Census Field Rep - Abstract during repo |          4        0.04       47.18
Census Field Rep - Abstract after rep p |      4,627       46.27       93.45
            Multiple categories checked |        565        5.65       99.10
                                Unknown |         90        0.90      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016