Frequencies for first 10,000 rows of birattnd variable in natl1980 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,860       98.60       98.60
          2 |         51        0.51       99.11
          3 |         64        0.64       99.75
          4 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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