Frequencies for first 10,000 rows of ager22 variable in mort1975 dataset :

     ager22 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          9        0.09        0.09
          2 |         85        0.85        0.94
          3 |         73        0.73        1.67
          4 |         94        0.94        2.61
          5 |         59        0.59        3.20
          6 |         67        0.67        3.87
          7 |         63        0.63        4.50
          8 |         49        0.49        4.99
          9 |        242        2.42        7.41
         10 |        130        1.30        8.71
         11 |         88        0.88        9.59
         12 |        170        1.70       11.29
         13 |         83        0.83       12.12
         14 |         78        0.78       12.90
         15 |         55        0.55       13.45
         16 |         50        0.50       13.95
         17 |         36        0.36       14.31
         18 |         20        0.20       14.51
         19 |         25        0.25       14.76
         20 |         31        0.31       15.07
         21 |         16        0.16       15.23
         22 |         21        0.21       15.44
          . |      8,456       84.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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