Frequencies for first 10,000 rows of previs_rec variable in natlterr2015 dataset :

  Number of |
   Prenatal |
     Visits |
  Recode 01 |
  No visits |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        126        1.26        1.26
          2 |        298        2.98        4.24
          3 |        475        4.75        8.99
          4 |        649        6.49       15.48
          5 |        938        9.38       24.86
          6 |      1,758       17.58       42.44
          7 |      1,789       17.89       60.33
          8 |      1,207       12.07       72.40
          9 |        819        8.19       80.59
         10 |        273        2.73       83.32
         11 |        275        2.75       86.07
         12 |      1,393       13.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016