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

      Fetal |
Presentatio |
      n RFP |
619=f_md_pr |
    esent R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          1 |      3,563       35.63       98.38
          2 |        119        1.19       99.57
          3 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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