Frequencies for first 10,000 rows of mplbir variable in natl1973 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,934       79.34       79.34
          2 |          1        0.01       79.35
          3 |          8        0.08       79.43
          4 |         34        0.34       79.77
          5 |         53        0.53       80.30
          6 |         18        0.18       80.48
          7 |          8        0.08       80.56
          8 |          2        0.02       80.58
          9 |          6        0.06       80.64
         10 |        226        2.26       82.90
         11 |        247        2.47       85.37
         12 |          5        0.05       85.42
         13 |          2        0.02       85.44
         14 |         71        0.71       86.15
         15 |         47        0.47       86.62
         16 |         16        0.16       86.78
         17 |         21        0.21       86.99
         18 |         62        0.62       87.61
         19 |         57        0.57       88.18
         20 |          4        0.04       88.22
         21 |         11        0.11       88.33
         22 |         12        0.12       88.45
         23 |         63        0.63       89.08
         24 |         18        0.18       89.26
         25 |        174        1.74       91.00
         26 |         35        0.35       91.35
         27 |          6        0.06       91.41
         28 |          6        0.06       91.47
         29 |          1        0.01       91.48
         30 |          3        0.03       91.51
         31 |         16        0.16       91.67
         32 |          7        0.07       91.74
         33 |         40        0.40       92.14
         34 |         45        0.45       92.59
         35 |          2        0.02       92.61
         36 |         73        0.73       93.34
         37 |         20        0.20       93.54
         38 |          3        0.03       93.57
         39 |         52        0.52       94.09
         40 |          6        0.06       94.15
         41 |         42        0.42       94.57
         42 |          8        0.08       94.65
         43 |        195        1.95       96.60
         44 |         97        0.97       97.57
         45 |         10        0.10       97.67
         46 |          5        0.05       97.72
         47 |         33        0.33       98.05
         48 |         11        0.11       98.16
         49 |         25        0.25       98.41
         50 |         15        0.15       98.56
         51 |          2        0.02       98.58
         52 |          2        0.02       98.60
         54 |          2        0.02       98.62
         55 |          8        0.08       98.70
         56 |          2        0.02       98.72
         57 |          2        0.02       98.74
         58 |          5        0.05       98.79
         59 |         68        0.68       99.47
         99 |         53        0.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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