Frequencies for first 10,000 rows of whocomp variable in nhamcsed2001 dataset :

        who |
  completed |
the patient |
     record |
     forms? |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,033       60.33       60.33
          2 |        172        1.72       62.05
          3 |      2,662       26.62       88.67
          4 |         54        0.54       89.21
          5 |        804        8.04       97.25
          6 |        275        2.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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