Frequencies for first 10,000 rows of birattnd variable in natl1976 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,707       97.07       97.07
          2 |         57        0.57       97.64
          3 |        217        2.17       99.81
          4 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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