Frequencies for first 10,000 rows of mplbir variable in natlterr1995 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.01        0.01
          3 |          1        0.01        0.02
          5 |         12        0.12        0.14
          6 |          1        0.01        0.15
          7 |         51        0.51        0.66
          8 |          3        0.03        0.69
          9 |          2        0.02        0.71
         10 |         20        0.20        0.91
         11 |          3        0.03        0.94
         12 |          3        0.03        0.97
         14 |        112        1.12        2.09
         15 |          4        0.04        2.13
         17 |          2        0.02        2.15
         18 |          1        0.01        2.16
         19 |          4        0.04        2.20
         20 |          1        0.01        2.21
         21 |          3        0.03        2.24
         22 |         56        0.56        2.80
         23 |          4        0.04        2.84
         24 |          1        0.01        2.85
         26 |          1        0.01        2.86
         31 |        205        2.05        4.91
         33 |        833        8.33       13.24
         34 |          4        0.04       13.28
         36 |         12        0.12       13.40
         39 |         59        0.59       13.99
         40 |          2        0.02       14.01
         41 |          1        0.01       14.02
         43 |          1        0.01       14.03
         44 |          6        0.06       14.09
         45 |          1        0.01       14.10
         47 |          2        0.02       14.12
         48 |          3        0.03       14.15
         50 |          4        0.04       14.19
         52 |      8,183       81.83       96.02
         53 |         11        0.11       96.13
         55 |          3        0.03       96.16
         56 |         20        0.20       96.36
         57 |          8        0.08       96.44
         59 |        356        3.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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