Frequencies for first 10,000 rows of mplbir variable in natlterr1997 dataset :

   Place of |
   Birth of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |          1        0.01        0.03
          3 |          2        0.02        0.05
          4 |          2        0.02        0.07
          5 |         10        0.10        0.17
          6 |          1        0.01        0.18
          7 |         48        0.48        0.66
          8 |          3        0.03        0.69
         10 |         32        0.32        1.01
         11 |          2        0.02        1.03
         12 |          1        0.01        1.04
         14 |         96        0.96        2.00
         15 |          2        0.02        2.02
         16 |          1        0.01        2.03
         17 |          1        0.01        2.04
         18 |          2        0.02        2.06
         19 |          2        0.02        2.08
         20 |          2        0.02        2.10
         21 |          3        0.03        2.13
         22 |         67        0.67        2.80
         23 |          2        0.02        2.82
         24 |          1        0.01        2.83
         25 |          1        0.01        2.84
         26 |          2        0.02        2.86
         30 |          3        0.03        2.89
         31 |        185        1.85        4.74
         32 |          2        0.02        4.76
         33 |        672        6.72       11.48
         36 |         25        0.25       11.73
         37 |          1        0.01       11.74
         38 |          1        0.01       11.75
         39 |         49        0.49       12.24
         40 |          2        0.02       12.26
         41 |          1        0.01       12.27
         42 |          1        0.01       12.28
         43 |          1        0.01       12.29
         44 |          8        0.08       12.37
         47 |          6        0.06       12.43
         48 |          1        0.01       12.44
         50 |          8        0.08       12.52
         52 |      8,393       83.93       96.45
         53 |          3        0.03       96.48
         55 |          2        0.02       96.50
         56 |         18        0.18       96.68
         57 |          5        0.05       96.73
         59 |        327        3.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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