Frequencies for first 10,000 rows of uprevis variable in natl2005 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         30        0.30        0.30
          1 |         60        0.60        0.90
          2 |        103        1.03        1.93
          3 |        150        1.50        3.43
          4 |        198        1.98        5.41
          5 |        302        3.02        8.43
          6 |        405        4.05       12.48
          7 |        515        5.15       17.63
          8 |        653        6.53       24.16
          9 |        681        6.81       30.97
         10 |      1,265       12.65       43.62
         11 |        758        7.58       51.20
         12 |      1,478       14.78       65.98
         13 |        691        6.91       72.89
         14 |        577        5.77       78.66
         15 |        696        6.96       85.62
         16 |        246        2.46       88.08
         17 |        108        1.08       89.16
         18 |        109        1.09       90.25
         19 |         29        0.29       90.54
         20 |        245        2.45       92.99
         21 |          6        0.06       93.05
         22 |          9        0.09       93.14
         23 |          9        0.09       93.23
         24 |          7        0.07       93.30
         25 |         28        0.28       93.58
         26 |          2        0.02       93.60
         27 |          2        0.02       93.62
         28 |          2        0.02       93.64
         29 |          2        0.02       93.66
         30 |         27        0.27       93.93
         33 |          1        0.01       93.94
         35 |          2        0.02       93.96
         36 |          2        0.02       93.98
         38 |          1        0.01       93.99
         40 |          3        0.03       94.02
         45 |          1        0.01       94.03
         49 |          2        0.02       94.05
         99 |        595        5.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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