Frequencies for first 10,000 rows of pct012k137 variable in sf12010860us30 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,879       88.79       88.79
          1 |        811        8.11       96.90
          2 |        179        1.79       98.69
          3 |         72        0.72       99.41
          4 |         28        0.28       99.69
          5 |          7        0.07       99.76
          6 |          4        0.04       99.80
          7 |          2        0.02       99.82
          8 |          3        0.03       99.85
         10 |          1        0.01       99.86
         11 |          1        0.01       99.87
         13 |          1        0.01       99.88
         14 |          1        0.01       99.89
         17 |          1        0.01       99.90
         26 |          1        0.01       99.91
         28 |          1        0.01       99.92
         29 |          1        0.01       99.93
         30 |          1        0.01       99.94
         34 |          1        0.01       99.95
         41 |          1        0.01       99.96
         57 |          1        0.01       99.97
         62 |          1        0.01       99.98
         68 |          1        0.01       99.99
         90 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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