Frequencies for first 10,000 rows of mplbir variable in natl1987 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,025       70.25       70.25
          2 |         12        0.12       70.37
          3 |         12        0.12       70.49
          4 |         29        0.29       70.78
          5 |        114        1.14       71.92
          6 |         22        0.22       72.14
          7 |         19        0.19       72.33
          8 |          4        0.04       72.37
          9 |         24        0.24       72.61
         10 |        309        3.09       75.70
         11 |        278        2.78       78.48
         12 |          8        0.08       78.56
         13 |          3        0.03       78.59
         14 |        176        1.76       80.35
         15 |         83        0.83       81.18
         16 |         15        0.15       81.33
         17 |         25        0.25       81.58
         18 |         56        0.56       82.14
         19 |         96        0.96       83.10
         20 |         10        0.10       83.20
         21 |         27        0.27       83.47
         22 |         31        0.31       83.78
         23 |        117        1.17       84.95
         24 |         11        0.11       85.06
         25 |        186        1.86       86.92
         26 |         51        0.51       87.43
         27 |          4        0.04       87.47
         28 |          8        0.08       87.55
         29 |          3        0.03       87.58
         30 |          4        0.04       87.62
         31 |         40        0.40       88.02
         32 |         10        0.10       88.12
         33 |        122        1.22       89.34
         34 |         59        0.59       89.93
         35 |          3        0.03       89.96
         36 |        102        1.02       90.98
         37 |         25        0.25       91.23
         38 |          9        0.09       91.32
         39 |         52        0.52       91.84
         40 |          5        0.05       91.89
         41 |         47        0.47       92.36
         42 |          4        0.04       92.40
         43 |        247        2.47       94.87
         44 |        135        1.35       96.22
         45 |          7        0.07       96.29
         46 |          3        0.03       96.32
         47 |         61        0.61       96.93
         48 |         18        0.18       97.11
         49 |         25        0.25       97.36
         50 |         20        0.20       97.56
         51 |          3        0.03       97.59
         52 |          7        0.07       97.66
         54 |          1        0.01       97.67
         55 |          9        0.09       97.76
         56 |          3        0.03       97.79
         57 |          7        0.07       97.86
         59 |        205        2.05       99.91
         99 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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