Frequencies for first 10,000 rows of mplbir variable in natlterr2001 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          2        0.02        0.02
          4 |          1        0.01        0.03
          5 |         13        0.13        0.16
          6 |          2        0.02        0.18
          7 |         51        0.51        0.69
          8 |          2        0.02        0.71
          9 |          1        0.01        0.72
         10 |         13        0.13        0.85
         11 |          3        0.03        0.88
         12 |          1        0.01        0.89
         14 |        105        1.05        1.94
         15 |          3        0.03        1.97
         18 |          2        0.02        1.99
         19 |          3        0.03        2.02
         21 |          2        0.02        2.04
         22 |         61        0.61        2.65
         23 |          2        0.02        2.67
         24 |          1        0.01        2.68
         26 |          3        0.03        2.71
         28 |          1        0.01        2.72
         30 |          2        0.02        2.74
         31 |        159        1.59        4.33
         32 |          1        0.01        4.34
         33 |        523        5.23        9.57
         34 |          4        0.04        9.61
         36 |         12        0.12        9.73
         37 |          2        0.02        9.75
         39 |         41        0.41       10.16
         40 |          2        0.02       10.18
         43 |          1        0.01       10.19
         44 |         10        0.10       10.29
         47 |          1        0.01       10.30
         48 |          1        0.01       10.31
         50 |          7        0.07       10.38
         52 |      8,529       85.29       95.67
         53 |          9        0.09       95.76
         56 |         23        0.23       95.99
         57 |          9        0.09       96.08
         59 |        392        3.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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