Frequencies for first 10,000 rows of uprevis variable in natl2003 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         35        0.35        0.35
          1 |         51        0.51        0.86
          2 |         91        0.91        1.77
          3 |        146        1.46        3.23
          4 |        204        2.04        5.27
          5 |        292        2.92        8.19
          6 |        373        3.73       11.92
          7 |        439        4.39       16.31
          8 |        553        5.53       21.84
          9 |        654        6.54       28.38
         10 |      1,177       11.77       40.15
         11 |        791        7.91       48.06
         12 |      1,362       13.62       61.68
         13 |        701        7.01       68.69
         14 |        600        6.00       74.69
         15 |        641        6.41       81.10
         16 |        183        1.83       82.93
         17 |         98        0.98       83.91
         18 |         90        0.90       84.81
         19 |         24        0.24       85.05
         20 |        223        2.23       87.28
         21 |         24        0.24       87.52
         22 |         20        0.20       87.72
         23 |          8        0.08       87.80
         24 |          7        0.07       87.87
         25 |         23        0.23       88.10
         26 |          4        0.04       88.14
         27 |          3        0.03       88.17
         28 |          4        0.04       88.21
         29 |          1        0.01       88.22
         30 |         30        0.30       88.52
         31 |          3        0.03       88.55
         32 |          2        0.02       88.57
         35 |          5        0.05       88.62
         37 |          1        0.01       88.63
         40 |          1        0.01       88.64
         47 |          1        0.01       88.65
         49 |          5        0.05       88.70
         99 |      1,130       11.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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