Frequencies for first 10,000 rows of mplbir variable in natl1975 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,746       77.46       77.46
          2 |          5        0.05       77.51
          3 |         11        0.11       77.62
          4 |         44        0.44       78.06
          5 |         50        0.50       78.56
          6 |          8        0.08       78.64
          7 |          6        0.06       78.70
          9 |         16        0.16       78.86
         10 |        247        2.47       81.33
         11 |        267        2.67       84.00
         12 |          9        0.09       84.09
         13 |          4        0.04       84.13
         14 |         98        0.98       85.11
         15 |         51        0.51       85.62
         16 |          5        0.05       85.67
         17 |         18        0.18       85.85
         18 |         60        0.60       86.45
         19 |         56        0.56       87.01
         20 |          2        0.02       87.03
         21 |         19        0.19       87.22
         22 |         14        0.14       87.36
         23 |         74        0.74       88.10
         24 |         11        0.11       88.21
         25 |        229        2.29       90.50
         26 |         28        0.28       90.78
         27 |          2        0.02       90.80
         28 |          6        0.06       90.86
         29 |          3        0.03       90.89
         30 |          1        0.01       90.90
         31 |         17        0.17       91.07
         32 |         12        0.12       91.19
         33 |         46        0.46       91.65
         34 |         62        0.62       92.27
         35 |          7        0.07       92.34
         36 |         73        0.73       93.07
         37 |         22        0.22       93.29
         38 |          7        0.07       93.36
         39 |         41        0.41       93.77
         40 |          5        0.05       93.82
         41 |         41        0.41       94.23
         42 |          4        0.04       94.27
         43 |        203        2.03       96.30
         44 |        109        1.09       97.39
         45 |          1        0.01       97.40
         46 |          5        0.05       97.45
         47 |         46        0.46       97.91
         48 |         20        0.20       98.11
         49 |         14        0.14       98.25
         50 |         21        0.21       98.46
         51 |          6        0.06       98.52
         52 |          2        0.02       98.54
         54 |          1        0.01       98.55
         55 |          7        0.07       98.62
         57 |          7        0.07       98.69
         58 |         12        0.12       98.81
         59 |         82        0.82       99.63
         99 |         37        0.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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