Frequencies for first 10,000 rows of ume_forcep variable in natl2008 dataset :

Forceps RFP |
734=f_u_for |
    cep U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        123        1.23        1.23
          2 |      9,822       98.22       99.45
          9 |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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