Frequencies for first 10,000 rows of birattnd variable in natl1979 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,839       98.39       98.39
          2 |         49        0.49       98.88
          3 |         96        0.96       99.84
          4 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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