Frequencies for first 10,000 rows of ilp_r11 variable in natl2013 dataset :

   Interval |
 Since Last |
  Pregnancy |
  Recode 11 |
RFP 571=? R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        117        1.17        1.17
          1 |        296        2.96        4.13
          2 |        803        8.03       12.16
          3 |        803        8.03       20.19
          4 |      1,319       13.19       33.38
          5 |        748        7.48       40.86
          6 |        422        4.22       45.08
          7 |        282        2.82       47.90
          8 |        605        6.05       53.95
         88 |      2,792       27.92       81.87
         99 |      1,813       18.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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