Frequencies for first 10,000 rows of ume_forcp variable in natlterr2007 dataset :

Forceps RFP |
734=f_u_for |
     cp U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         26        0.26        0.26
          2 |      8,517       85.17       85.43
          9 |      1,457       14.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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