Frequencies for first 10,000 rows of mager41 variable in linkpe2009psden dataset :

   Mother's |
 Age Recode |
     41 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
         12 |          1        0.01        0.01
         13 |          3        0.03        0.04
         14 |         27        0.27        0.31
         15 |         85        0.85        1.16
         16 |        180        1.80        2.96
         17 |        333        3.33        6.29
         18 |        449        4.49       10.78
         19 |        551        5.51       16.29
         20 |        639        6.39       22.68
         21 |        654        6.54       29.22
         22 |        632        6.32       35.54
         23 |        621        6.21       41.75
         24 |        534        5.34       47.09
         25 |        551        5.51       52.60
         26 |        523        5.23       57.83
         27 |        529        5.29       63.12
         28 |        481        4.81       67.93
         29 |        493        4.93       72.86
         30 |        388        3.88       76.74
         31 |        390        3.90       80.64
         32 |        336        3.36       84.00
         33 |        253        2.53       86.53
         34 |        299        2.99       89.52
         35 |        214        2.14       91.66
         36 |        198        1.98       93.64
         37 |        173        1.73       95.37
         38 |        148        1.48       96.85
         39 |        112        1.12       97.97
         40 |         68        0.68       98.65
         41 |         57        0.57       99.22
         42 |         33        0.33       99.55
         43 |         25        0.25       99.80
         44 |         11        0.11       99.91
         45 |          4        0.04       99.95
         46 |          3        0.03       99.98
         47 |          1        0.01       99.99
         49 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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