Frequencies for first 10,000 rows of ilop_r11 variable in natlterr2013 dataset :

   Interval |
 Since Last |
      Other |
  Pregnancy |
    Outcome |
  Recode 11 |
RFP 571=? R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        114        1.14        1.14
          2 |        212        2.12        3.26
          3 |        134        1.34        4.60
          4 |        199        1.99        6.59
          5 |        119        1.19        7.78
          6 |         89        0.89        8.67
          7 |         68        0.68        9.35
          8 |        292        2.92       12.27
         88 |      7,331       73.31       85.58
         99 |        365        3.65       89.23
          . |      1,077       10.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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