Frequencies for first 10,000 rows of ume_forcep variable in natlterr2006 dataset :

Forceps RFP |
734=f_u_for |
    cep U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         27        0.27        0.27
          2 |      8,513       85.13       85.40
          9 |      1,460       14.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015