Frequencies for first 10,000 rows of uprevis variable in natlterr2010 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        348        3.48        3.48
          1 |         83        0.83        4.31
          2 |        135        1.35        5.66
          3 |        186        1.86        7.52
          4 |        241        2.41        9.93
          5 |        339        3.39       13.32
          6 |        392        3.92       17.24
          7 |        423        4.23       21.47
          8 |        623        6.23       27.70
          9 |        681        6.81       34.51
         10 |      1,233       12.33       46.84
         11 |        701        7.01       53.85
         12 |      1,034       10.34       64.19
         13 |        529        5.29       69.48
         14 |        485        4.85       74.33
         15 |        432        4.32       78.65
         16 |        199        1.99       80.64
         17 |         82        0.82       81.46
         18 |         92        0.92       82.38
         19 |         35        0.35       82.73
         20 |        111        1.11       83.84
         21 |         16        0.16       84.00
         22 |         14        0.14       84.14
         23 |          8        0.08       84.22
         24 |          7        0.07       84.29
         25 |         19        0.19       84.48
         26 |          5        0.05       84.53
         27 |          3        0.03       84.56
         28 |          9        0.09       84.65
         30 |         19        0.19       84.84
         32 |          2        0.02       84.86
         35 |          2        0.02       84.88
         36 |          2        0.02       84.90
         38 |          3        0.03       84.93
         39 |          2        0.02       84.95
         40 |          1        0.01       84.96
         49 |          4        0.04       85.00
         99 |      1,500       15.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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