Frequencies for first 10,000 rows of mplbir variable in natlterr1996 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          2 |          3        0.03        0.04
          3 |          1        0.01        0.05
          4 |          1        0.01        0.06
          5 |          8        0.08        0.14
          6 |          2        0.02        0.16
          7 |         61        0.61        0.77
          9 |          1        0.01        0.78
         10 |         16        0.16        0.94
         11 |          4        0.04        0.98
         12 |          1        0.01        0.99
         14 |        109        1.09        2.08
         15 |          2        0.02        2.10
         18 |          2        0.02        2.12
         19 |          2        0.02        2.14
         21 |          1        0.01        2.15
         22 |         40        0.40        2.55
         23 |          9        0.09        2.64
         26 |          1        0.01        2.65
         27 |          1        0.01        2.66
         30 |          1        0.01        2.67
         31 |        166        1.66        4.33
         33 |        685        6.85       11.18
         34 |          1        0.01       11.19
         36 |         10        0.10       11.29
         37 |          2        0.02       11.31
         39 |         58        0.58       11.89
         40 |          2        0.02       11.91
         41 |          1        0.01       11.92
         43 |          3        0.03       11.95
         44 |         15        0.15       12.10
         47 |          5        0.05       12.15
         48 |          1        0.01       12.16
         50 |          6        0.06       12.22
         52 |      8,413       84.13       96.35
         53 |          7        0.07       96.42
         55 |          1        0.01       96.43
         56 |         19        0.19       96.62
         57 |          7        0.07       96.69
         59 |        331        3.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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