Frequencies for first 10,000 rows of birattnd variable in natl1987 dataset :

  Attendant |
   at birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,940       99.40       99.40
          2 |         28        0.28       99.68
          3 |          1        0.01       99.69
          4 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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