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

      Fetal |
Presentatio |
      n RFP |
619=f_md_pr |
    esent R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,163       61.63       61.63
          1 |      3,708       37.08       98.71
          2 |         87        0.87       99.58
          3 |         41        0.41       99.99
          9 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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