Frequencies for first 10,000 rows of previs_rec variable in natlterr2010 dataset :

  Number of |
   Prenatal |
     Visits |
 Recode U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        348        3.48        3.48
          2 |        218        2.18        5.66
          3 |        427        4.27        9.93
          4 |        731        7.31       17.24
          5 |      1,046       10.46       27.70
          6 |      1,914       19.14       46.84
          7 |      1,735       17.35       64.19
          8 |      1,014       10.14       74.33
          9 |        631        6.31       80.64
         10 |        174        1.74       82.38
         11 |        262        2.62       85.00
         12 |      1,500       15.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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