Frequencies for first 10,000 rows of mplbir variable in natl1985 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,108       71.08       71.08
          2 |          8        0.08       71.16
          3 |         12        0.12       71.28
          4 |         21        0.21       71.49
          5 |         99        0.99       72.48
          6 |         18        0.18       72.66
          7 |         10        0.10       72.76
          8 |          7        0.07       72.83
          9 |         11        0.11       72.94
         10 |        363        3.63       76.57
         11 |        315        3.15       79.72
         12 |         12        0.12       79.84
         13 |          3        0.03       79.87
         14 |        138        1.38       81.25
         15 |         74        0.74       81.99
         16 |         16        0.16       82.15
         17 |         29        0.29       82.44
         18 |         55        0.55       82.99
         19 |         61        0.61       83.60
         20 |          4        0.04       83.64
         21 |         21        0.21       83.85
         22 |         25        0.25       84.10
         23 |        133        1.33       85.43
         24 |         15        0.15       85.58
         25 |        201        2.01       87.59
         26 |         35        0.35       87.94
         27 |          7        0.07       88.01
         28 |         10        0.10       88.11
         29 |          3        0.03       88.14
         30 |          2        0.02       88.16
         31 |         37        0.37       88.53
         32 |         12        0.12       88.65
         33 |        114        1.14       89.79
         34 |         60        0.60       90.39
         35 |          6        0.06       90.45
         36 |         98        0.98       91.43
         37 |         28        0.28       91.71
         38 |         12        0.12       91.83
         39 |         53        0.53       92.36
         40 |          5        0.05       92.41
         41 |         58        0.58       92.99
         42 |          5        0.05       93.04
         43 |        221        2.21       95.25
         44 |        106        1.06       96.31
         45 |          5        0.05       96.36
         46 |          2        0.02       96.38
         47 |         55        0.55       96.93
         48 |         21        0.21       97.14
         49 |         21        0.21       97.35
         50 |         25        0.25       97.60
         51 |          2        0.02       97.62
         52 |          6        0.06       97.68
         53 |          2        0.02       97.70
         54 |          2        0.02       97.72
         55 |          5        0.05       97.77
         56 |          3        0.03       97.80
         57 |          4        0.04       97.84
         59 |        206        2.06       99.90
         99 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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