Frequencies for first 10,000 rows of birattnd variable in natl1981 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,904       99.04       99.04
          2 |         37        0.37       99.41
          3 |         34        0.34       99.75
          4 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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