Frequencies for first 10,000 rows of uprevis variable in natl2007 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         35        0.35        0.35
          1 |        107        1.07        1.42
          2 |        120        1.20        2.62
          3 |        178        1.78        4.40
          4 |        234        2.34        6.74
          5 |        304        3.04        9.78
          6 |        418        4.18       13.96
          7 |        577        5.77       19.73
          8 |        717        7.17       26.90
          9 |        739        7.39       34.29
         10 |      1,200       12.00       46.29
         11 |        748        7.48       53.77
         12 |      1,329       13.29       67.06
         13 |        582        5.82       72.88
         14 |        563        5.63       78.51
         15 |        689        6.89       85.40
         16 |        204        2.04       87.44
         17 |         87        0.87       88.31
         18 |        104        1.04       89.35
         19 |         17        0.17       89.52
         20 |        253        2.53       92.05
         21 |         16        0.16       92.21
         22 |          9        0.09       92.30
         23 |          7        0.07       92.37
         24 |         16        0.16       92.53
         25 |         18        0.18       92.71
         26 |          1        0.01       92.72
         27 |          2        0.02       92.74
         28 |          1        0.01       92.75
         30 |         25        0.25       93.00
         32 |          1        0.01       93.01
         35 |          6        0.06       93.07
         36 |          1        0.01       93.08
         38 |          5        0.05       93.13
         39 |          5        0.05       93.18
         40 |          7        0.07       93.25
         41 |          1        0.01       93.26
         42 |          2        0.02       93.28
         45 |          1        0.01       93.29
         49 |          6        0.06       93.35
         99 |        665        6.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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