Frequencies for first 10,000 rows of uprevis variable in linkpe2009psden dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        210        2.10        2.10
          1 |         54        0.54        2.64
          2 |         82        0.82        3.46
          3 |        136        1.36        4.82
          4 |        193        1.93        6.75
          5 |        307        3.07        9.82
          6 |        389        3.89       13.71
          7 |        515        5.15       18.86
          8 |        685        6.85       25.71
          9 |        768        7.68       33.39
         10 |      1,568       15.68       49.07
         11 |        915        9.15       58.22
         12 |      1,350       13.50       71.72
         13 |        684        6.84       78.56
         14 |        647        6.47       85.03
         15 |        558        5.58       90.61
         16 |        268        2.68       93.29
         17 |        142        1.42       94.71
         18 |        126        1.26       95.97
         19 |         47        0.47       96.44
         20 |        145        1.45       97.89
         21 |          6        0.06       97.95
         22 |         11        0.11       98.06
         23 |         13        0.13       98.19
         24 |          8        0.08       98.27
         25 |         19        0.19       98.46
         26 |          5        0.05       98.51
         27 |          2        0.02       98.53
         28 |          2        0.02       98.55
         29 |          2        0.02       98.57
         30 |         19        0.19       98.76
         31 |          1        0.01       98.77
         32 |          3        0.03       98.80
         34 |          1        0.01       98.81
         35 |          4        0.04       98.85
         36 |          2        0.02       98.87
         37 |          1        0.01       98.88
         38 |          7        0.07       98.95
         39 |          1        0.01       98.96
         40 |          9        0.09       99.05
         44 |          1        0.01       99.06
         45 |          2        0.02       99.08
         48 |          1        0.01       99.09
         49 |          3        0.03       99.12
         99 |         88        0.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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