Frequencies for first 10,000 rows of previs_rec variable in natl2010 dataset :

  Number of |
   Prenatal |
     Visits |
 Recode RFP |
 671=f_tpcv |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         48        0.48        0.48
          2 |        196        1.96        2.44
          3 |        402        4.02        6.46
          4 |        803        8.03       14.49
          5 |      1,291       12.91       27.40
          6 |      2,152       21.52       48.92
          7 |      1,905       19.05       67.97
          8 |      1,220       12.20       80.17
          9 |        609        6.09       86.26
         10 |        166        1.66       87.92
         11 |        188        1.88       89.80
         12 |      1,020       10.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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