Frequencies for first 10,000 rows of nprev12 variable in natlterr2000 dataset :

  Number of |
   Prenatal |
     Visits |
     Recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         85        0.85        0.85
          2 |         90        0.90        1.75
          3 |        349        3.49        5.24
          4 |        803        8.03       13.27
          5 |      1,312       13.12       26.39
          6 |      2,711       27.11       53.50
          7 |      2,226       22.26       75.76
          8 |      1,048       10.48       86.24
          9 |        913        9.13       95.37
         10 |        231        2.31       97.68
         11 |        221        2.21       99.89
         12 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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