Frequencies for first 10,000 rows of pregcat variable in h68f4 dataset :

     MULTUM |
  PREGNANCY |
   CATEGORY |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        138        1.38        1.38
          A |        314        3.14        4.52
          B |      2,504       25.04       29.56
          C |      3,783       37.83       67.39
          D |      1,059       10.59       77.98
          N |        958        9.58       87.56
          X |      1,244       12.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018