Frequencies for first 10,000 rows of pct012c020 variable in sf12000860us18 dataset :

   17 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,552       85.52       85.52
          1 |        975        9.75       95.27
          2 |        255        2.55       97.82
          3 |         92        0.92       98.74
          4 |         39        0.39       99.13
          5 |         33        0.33       99.46
          6 |          9        0.09       99.55
          7 |          7        0.07       99.62
          8 |          7        0.07       99.69
          9 |          5        0.05       99.74
         10 |          7        0.07       99.81
         11 |          3        0.03       99.84
         12 |          3        0.03       99.87
         13 |          1        0.01       99.88
         15 |          1        0.01       99.89
         16 |          1        0.01       99.90
         18 |          1        0.01       99.91
         29 |          1        0.01       99.92
         30 |          1        0.01       99.93
         33 |          1        0.01       99.94
         36 |          1        0.01       99.95
         45 |          1        0.01       99.96
         62 |          1        0.01       99.97
         66 |          1        0.01       99.98
         84 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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