Frequencies for first 10,000 rows of pct012k026 variable in sf12010860us30 dataset :

   23 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,895       88.95       88.95
          1 |        779        7.79       96.74
          2 |        206        2.06       98.80
          3 |         51        0.51       99.31
          4 |         22        0.22       99.53
          5 |          8        0.08       99.61
          6 |         10        0.10       99.71
          7 |          1        0.01       99.72
          8 |          7        0.07       99.79
          9 |          5        0.05       99.84
         10 |          2        0.02       99.86
         11 |          1        0.01       99.87
         12 |          2        0.02       99.89
         13 |          3        0.03       99.92
         14 |          1        0.01       99.93
         18 |          1        0.01       99.94
         28 |          1        0.01       99.95
         36 |          1        0.01       99.96
         50 |          1        0.01       99.97
         56 |          1        0.01       99.98
         67 |          1        0.01       99.99
         68 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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