Frequencies for first 10,000 rows of uprevis variable in natl2008 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        249        2.49        2.49
          1 |         33        0.33        2.82
          2 |         85        0.85        3.67
          3 |         94        0.94        4.61
          4 |        147        1.47        6.08
          5 |        235        2.35        8.43
          6 |        330        3.30       11.73
          7 |        359        3.59       15.32
          8 |        647        6.47       21.79
          9 |        660        6.60       28.39
         10 |      1,433       14.33       42.72
         11 |        955        9.55       52.27
         12 |      2,009       20.09       72.36
         13 |        767        7.67       80.03
         14 |        812        8.12       88.15
         15 |        642        6.42       94.57
         16 |        220        2.20       96.77
         17 |         70        0.70       97.47
         18 |         84        0.84       98.31
         19 |         23        0.23       98.54
         20 |         61        0.61       99.15
         21 |         17        0.17       99.32
         22 |          7        0.07       99.39
         23 |          8        0.08       99.47
         24 |          3        0.03       99.50
         25 |         10        0.10       99.60
         26 |          2        0.02       99.62
         28 |          4        0.04       99.66
         30 |          8        0.08       99.74
         40 |          2        0.02       99.76
         49 |          4        0.04       99.80
         99 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016