Frequencies for first 10,000 rows of mplbir variable in natl1976 dataset :

   Mother's |
   Place of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,611       76.11       76.11
          2 |          7        0.07       76.18
          3 |          8        0.08       76.26
          4 |         33        0.33       76.59
          5 |         63        0.63       77.22
          6 |         20        0.20       77.42
          7 |          3        0.03       77.45
          8 |          2        0.02       77.47
          9 |         15        0.15       77.62
         10 |        278        2.78       80.40
         11 |        306        3.06       83.46
         12 |          7        0.07       83.53
         13 |          3        0.03       83.56
         14 |        111        1.11       84.67
         15 |         50        0.50       85.17
         16 |         18        0.18       85.35
         17 |         16        0.16       85.51
         18 |         47        0.47       85.98
         19 |         67        0.67       86.65
         20 |          6        0.06       86.71
         21 |         17        0.17       86.88
         22 |         29        0.29       87.17
         23 |        100        1.00       88.17
         24 |         12        0.12       88.29
         25 |        195        1.95       90.24
         26 |         35        0.35       90.59
         27 |          3        0.03       90.62
         28 |          8        0.08       90.70
         30 |          6        0.06       90.76
         31 |         25        0.25       91.01
         32 |          9        0.09       91.10
         33 |         53        0.53       91.63
         34 |         44        0.44       92.07
         35 |          6        0.06       92.13
         36 |         80        0.80       92.93
         37 |         16        0.16       93.09
         38 |          5        0.05       93.14
         39 |         51        0.51       93.65
         40 |          6        0.06       93.71
         41 |         31        0.31       94.02
         42 |          7        0.07       94.09
         43 |        239        2.39       96.48
         44 |         93        0.93       97.41
         45 |          4        0.04       97.45
         46 |          4        0.04       97.49
         47 |         43        0.43       97.92
         48 |         18        0.18       98.10
         49 |         18        0.18       98.28
         50 |         16        0.16       98.44
         51 |          5        0.05       98.49
         52 |          3        0.03       98.52
         54 |          3        0.03       98.55
         55 |          3        0.03       98.58
         57 |          2        0.02       98.60
         58 |         12        0.12       98.72
         59 |        115        1.15       99.87
         99 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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