Frequencies for first 10,000 rows of pct012c161 variable in sf12000860us18 dataset :

   54 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,993       89.93       89.93
          1 |        757        7.57       97.50
          2 |        163        1.63       99.13
          3 |         39        0.39       99.52
          4 |         21        0.21       99.73
          5 |          9        0.09       99.82
          6 |          2        0.02       99.84
          7 |          4        0.04       99.88
          9 |          1        0.01       99.89
         11 |          1        0.01       99.90
         13 |          2        0.02       99.92
         15 |          1        0.01       99.93
         16 |          1        0.01       99.94
         18 |          1        0.01       99.95
         26 |          1        0.01       99.96
         30 |          1        0.01       99.97
         36 |          1        0.01       99.98
         46 |          1        0.01       99.99
         52 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017