Frequencies for first 10,000 rows of previs_rec variable in natlterr2008 dataset :

  Number of |
   Prenatal |
     Visits |
 Recode U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        365        3.65        3.65
          2 |        319        3.19        6.84
          3 |        538        5.38       12.22
          4 |        834        8.34       20.56
          5 |        988        9.88       30.44
          6 |      1,840       18.40       48.84
          7 |      1,640       16.40       65.24
          8 |        951        9.51       74.75
          9 |        630        6.30       81.05
         10 |        154        1.54       82.59
         11 |        258        2.58       85.17
         12 |      1,483       14.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016