Frequencies for first 10,000 rows of pct012k130 variable in sf12010860us30 dataset :

   23 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,911       89.11       89.11
          1 |        796        7.96       97.07
          2 |        160        1.60       98.67
          3 |         64        0.64       99.31
          4 |         25        0.25       99.56
          5 |          9        0.09       99.65
          6 |          9        0.09       99.74
          7 |          4        0.04       99.78
          8 |          6        0.06       99.84
          9 |          2        0.02       99.86
         11 |          1        0.01       99.87
         12 |          2        0.02       99.89
         15 |          2        0.02       99.91
         21 |          2        0.02       99.93
         28 |          1        0.01       99.94
         36 |          1        0.01       99.95
         44 |          1        0.01       99.96
         47 |          1        0.01       99.97
         54 |          1        0.01       99.98
         59 |          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