Frequencies for first 10,000 rows of pct012k137 variable in sf12000860us26 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,823       88.23       88.23
          1 |        854        8.54       96.77
          2 |        197        1.97       98.74
          3 |         61        0.61       99.35
          4 |         23        0.23       99.58
          5 |         15        0.15       99.73
          6 |          6        0.06       99.79
          7 |          5        0.05       99.84
         10 |          2        0.02       99.86
         11 |          1        0.01       99.87
         12 |          1        0.01       99.88
         13 |          2        0.02       99.90
         22 |          1        0.01       99.91
         25 |          1        0.01       99.92
         26 |          1        0.01       99.93
         33 |          1        0.01       99.94
         41 |          1        0.01       99.95
         44 |          1        0.01       99.96
         47 |          1        0.01       99.97
         57 |          1        0.01       99.98
         74 |          1        0.01       99.99
         81 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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