Frequencies for first 10,000 rows of mplbir variable in natl2000 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,838       68.38       68.38
          2 |         13        0.13       68.51
          3 |         14        0.14       68.65
          4 |         31        0.31       68.96
          5 |        135        1.35       70.31
          6 |         17        0.17       70.48
          7 |         13        0.13       70.61
          8 |          3        0.03       70.64
          9 |          3        0.03       70.67
         10 |        299        2.99       73.66
         11 |        299        2.99       76.65
         12 |          9        0.09       76.74
         13 |          3        0.03       76.77
         14 |        132        1.32       78.09
         15 |         79        0.79       78.88
         16 |         17        0.17       79.05
         17 |         26        0.26       79.31
         18 |         61        0.61       79.92
         19 |        114        1.14       81.06
         20 |          7        0.07       81.13
         21 |         27        0.27       81.40
         22 |         28        0.28       81.68
         23 |        111        1.11       82.79
         24 |         12        0.12       82.91
         25 |        220        2.20       85.11
         26 |         39        0.39       85.50
         27 |          4        0.04       85.54
         28 |         11        0.11       85.65
         29 |          2        0.02       85.67
         30 |          3        0.03       85.70
         31 |         35        0.35       86.05
         32 |         14        0.14       86.19
         33 |        131        1.31       87.50
         34 |         67        0.67       88.17
         35 |          5        0.05       88.22
         36 |         99        0.99       89.21
         37 |         33        0.33       89.54
         38 |          5        0.05       89.59
         39 |         59        0.59       90.18
         40 |          2        0.02       90.20
         41 |         38        0.38       90.58
         42 |          3        0.03       90.61
         43 |        187        1.87       92.48
         44 |        153        1.53       94.01
         45 |          6        0.06       94.07
         47 |         58        0.58       94.65
         48 |         21        0.21       94.86
         49 |         21        0.21       95.07
         50 |         18        0.18       95.25
         51 |          5        0.05       95.30
         52 |          9        0.09       95.39
         53 |          4        0.04       95.43
         54 |          2        0.02       95.45
         55 |          7        0.07       95.52
         56 |          3        0.03       95.55
         57 |        154        1.54       97.09
         59 |        280        2.80       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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