Frequencies for first 10,000 rows of birattnd variable in natl1978 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,815       98.15       98.15
          2 |         47        0.47       98.62
          3 |        123        1.23       99.85
          4 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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