Frequencies for first 10,000 rows of mplbir variable in natl1988 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,021       70.21       70.21
          2 |          7        0.07       70.28
          3 |         15        0.15       70.43
          4 |         32        0.32       70.75
          5 |        116        1.16       71.91
          6 |         16        0.16       72.07
          7 |         11        0.11       72.18
          8 |          4        0.04       72.22
          9 |         12        0.12       72.34
         10 |        349        3.49       75.83
         11 |        409        4.09       79.92
         12 |         17        0.17       80.09
         13 |          5        0.05       80.14
         14 |        166        1.66       81.80
         15 |         75        0.75       82.55
         16 |         22        0.22       82.77
         17 |         33        0.33       83.10
         18 |         65        0.65       83.75
         19 |         90        0.90       84.65
         20 |          8        0.08       84.73
         21 |         23        0.23       84.96
         22 |         23        0.23       85.19
         23 |        125        1.25       86.44
         24 |         18        0.18       86.62
         25 |        137        1.37       87.99
         26 |         37        0.37       88.36
         27 |          1        0.01       88.37
         28 |          8        0.08       88.45
         29 |          3        0.03       88.48
         31 |         43        0.43       88.91
         32 |          9        0.09       89.00
         33 |        111        1.11       90.11
         34 |         70        0.70       90.81
         35 |          2        0.02       90.83
         36 |        107        1.07       91.90
         37 |         34        0.34       92.24
         38 |          3        0.03       92.27
         39 |         54        0.54       92.81
         40 |          8        0.08       92.89
         41 |         32        0.32       93.21
         42 |          3        0.03       93.24
         43 |        206        2.06       95.30
         44 |        107        1.07       96.37
         45 |          6        0.06       96.43
         46 |          6        0.06       96.49
         47 |         52        0.52       97.01
         48 |         12        0.12       97.13
         49 |         17        0.17       97.30
         50 |         25        0.25       97.55
         51 |          2        0.02       97.57
         52 |          5        0.05       97.62
         55 |          5        0.05       97.67
         56 |          1        0.01       97.68
         57 |          4        0.04       97.72
         59 |        220        2.20       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016