Frequencies for first 10,000 rows of me_pres variable in natl2013 dataset :

      Fetal |
Presentatio |
      n RFP |
619=f_md_pr |
    esent R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,182       91.82       91.82
          2 |        375        3.75       95.57
          3 |        440        4.40       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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