Frequencies for first 10,000 rows of uprevis variable in natl2009 dataset :

  Number of |
   Prenatal |
 Visits RFP |
 671=f_tpcv |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        219        2.19        2.19
          1 |         39        0.39        2.58
          2 |         75        0.75        3.33
          3 |        101        1.01        4.34
          4 |        117        1.17        5.51
          5 |        239        2.39        7.90
          6 |        361        3.61       11.51
          7 |        366        3.66       15.17
          8 |        670        6.70       21.87
          9 |        697        6.97       28.84
         10 |      1,637       16.37       45.21
         11 |        896        8.96       54.17
         12 |      1,627       16.27       70.44
         13 |        726        7.26       77.70
         14 |        792        7.92       85.62
         15 |        714        7.14       92.76
         16 |        291        2.91       95.67
         17 |         79        0.79       96.46
         18 |         67        0.67       97.13
         19 |         22        0.22       97.35
         20 |        122        1.22       98.57
         21 |          3        0.03       98.60
         22 |          7        0.07       98.67
         23 |          3        0.03       98.70
         24 |         33        0.33       99.03
         25 |         15        0.15       99.18
         26 |          1        0.01       99.19
         27 |          2        0.02       99.21
         30 |          6        0.06       99.27
         31 |          1        0.01       99.28
         32 |          1        0.01       99.29
         35 |          3        0.03       99.32
         40 |          1        0.01       99.33
         49 |          1        0.01       99.34
         99 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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