Frequencies for first 10,000 rows of pct013c008 variable in sf12010860us35 dataset :

   20 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,465       84.65       84.65
          1 |        923        9.23       93.88
          2 |        268        2.68       96.56
          3 |        140        1.40       97.96
          4 |         67        0.67       98.63
          5 |         38        0.38       99.01
          6 |         35        0.35       99.36
          7 |          9        0.09       99.45
          8 |         14        0.14       99.59
          9 |          7        0.07       99.66
         10 |          8        0.08       99.74
         11 |          3        0.03       99.77
         12 |          2        0.02       99.79
         13 |          2        0.02       99.81
         14 |          2        0.02       99.83
         15 |          2        0.02       99.85
         17 |          2        0.02       99.87
         19 |          3        0.03       99.90
         23 |          1        0.01       99.91
         28 |          1        0.01       99.92
         32 |          1        0.01       99.93
         33 |          1        0.01       99.94
         39 |          1        0.01       99.95
         47 |          1        0.01       99.96
         50 |          1        0.01       99.97
         61 |          1        0.01       99.98
         69 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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