Frequencies for first 10,000 rows of mplbir variable in natl1999 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,878       68.78       68.78
          2 |          4        0.04       68.82
          3 |         14        0.14       68.96
          4 |         38        0.38       69.34
          5 |        136        1.36       70.70
          6 |         22        0.22       70.92
          7 |         18        0.18       71.10
          8 |          3        0.03       71.13
          9 |         12        0.12       71.25
         10 |        259        2.59       73.84
         11 |        325        3.25       77.09
         12 |         10        0.10       77.19
         13 |          5        0.05       77.24
         14 |        145        1.45       78.69
         15 |         71        0.71       79.40
         16 |         12        0.12       79.52
         17 |         21        0.21       79.73
         18 |         50        0.50       80.23
         19 |        118        1.18       81.41
         20 |         10        0.10       81.51
         21 |         27        0.27       81.78
         22 |         25        0.25       82.03
         23 |        113        1.13       83.16
         24 |         10        0.10       83.26
         25 |        253        2.53       85.79
         26 |         43        0.43       86.22
         27 |          3        0.03       86.25
         28 |          9        0.09       86.34
         29 |          3        0.03       86.37
         30 |          3        0.03       86.40
         31 |         49        0.49       86.89
         32 |          7        0.07       86.96
         33 |        129        1.29       88.25
         34 |         67        0.67       88.92
         35 |          1        0.01       88.93
         36 |        135        1.35       90.28
         37 |         15        0.15       90.43
         38 |          5        0.05       90.48
         39 |         58        0.58       91.06
         40 |          8        0.08       91.14
         41 |         33        0.33       91.47
         42 |          3        0.03       91.50
         43 |        189        1.89       93.39
         44 |        152        1.52       94.91
         45 |          6        0.06       94.97
         46 |          5        0.05       95.02
         47 |         56        0.56       95.58
         48 |         15        0.15       95.73
         49 |         23        0.23       95.96
         50 |         18        0.18       96.14
         51 |          1        0.01       96.15
         52 |          6        0.06       96.21
         53 |          2        0.02       96.23
         54 |          2        0.02       96.25
         55 |          5        0.05       96.30
         56 |          1        0.01       96.31
         57 |        134        1.34       97.65
         59 |        228        2.28       99.93
         99 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015