Frequencies for first 10,000 rows of previs_rec variable in natlterr2012 dataset :

  Number of |
   Prenatal |
     Visits |
 Recode RFP |
 671=f_tpcv |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        299        2.99        2.99
          2 |        258        2.58        5.57
          3 |        389        3.89        9.46
          4 |        641        6.41       15.87
          5 |      1,039       10.39       26.26
          6 |      1,782       17.82       44.08
          7 |      1,607       16.07       60.15
          8 |      1,015       10.15       70.30
          9 |        598        5.98       76.28
         10 |        191        1.91       78.19
         11 |        222        2.22       80.41
         12 |      1,959       19.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016