Frequencies for first 10,000 rows of whocomp variable in nhamcsopd2006 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         Hospital staff |      4,202       42.02       42.02
Census Field Rep - Abstract during rep  |        180        1.80       43.82
Census Field Rep - Abstract after rep p |      4,294       42.94       86.76
                                  Other |        233        2.33       89.09
            Multiple categories checked |        528        5.28       94.37
                                Unknown |        563        5.63      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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