Frequencies for first 10,000 rows of uprevis variable in natlterr2007 dataset :

  Number of |
   Prenatal |
 Visits U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        363        3.63        3.63
          1 |        107        1.07        4.70
          2 |        177        1.77        6.47
          3 |        210        2.10        8.57
          4 |        239        2.39       10.96
          5 |        361        3.61       14.57
          6 |        447        4.47       19.04
          7 |        455        4.55       23.59
          8 |        668        6.68       30.27
          9 |        656        6.56       36.83
         10 |      1,260       12.60       49.43
         11 |        626        6.26       55.69
         12 |        953        9.53       65.22
         13 |        454        4.54       69.76
         14 |        446        4.46       74.22
         15 |        362        3.62       77.84
         16 |        133        1.33       79.17
         17 |         77        0.77       79.94
         18 |         77        0.77       80.71
         19 |         26        0.26       80.97
         20 |        104        1.04       82.01
         21 |         11        0.11       82.12
         22 |         15        0.15       82.27
         23 |          3        0.03       82.30
         24 |          3        0.03       82.33
         25 |         17        0.17       82.50
         26 |          2        0.02       82.52
         28 |          3        0.03       82.55
         30 |          6        0.06       82.61
         32 |          2        0.02       82.63
         33 |          1        0.01       82.64
         34 |          1        0.01       82.65
         37 |          2        0.02       82.67
         38 |          4        0.04       82.71
         39 |          3        0.03       82.74
         40 |          8        0.08       82.82
         45 |          1        0.01       82.83
         49 |          3        0.03       82.86
         99 |      1,714       17.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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