Frequencies for first 10,000 rows of whocomp variable in nhamcsed2006 dataset :

who completed the patient record forms? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                         hospital staff |      4,582       45.82       45.82
census field rep - abstract during rep  |        241        2.41       48.23
census field rep - abstract after rep p |      3,544       35.44       83.67
            multiple categories checked |        411        4.11       87.78
                                unknown |      1,222       12.22      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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