Frequencies for first 10,000 rows of ume_forcp variable in natlterr2010 dataset :

Forceps RFP |
734=f_u_for |
     cp U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        688        6.88        6.88
          2 |      8,049       80.49       87.37
          9 |      1,263       12.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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