Frequencies for first 10,000 rows of pct012c003 variable in sf12010860us22 dataset :

    Under 1 |
       year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,525       85.25       85.25
          1 |        902        9.02       94.27
          2 |        259        2.59       96.86
          3 |        131        1.31       98.17
          4 |         66        0.66       98.83
          5 |         37        0.37       99.20
          6 |         26        0.26       99.46
          7 |         11        0.11       99.57
          8 |          5        0.05       99.62
          9 |          9        0.09       99.71
         10 |          5        0.05       99.76
         11 |          3        0.03       99.79
         12 |          2        0.02       99.81
         13 |          3        0.03       99.84
         14 |          3        0.03       99.87
         15 |          2        0.02       99.89
         16 |          1        0.01       99.90
         17 |          1        0.01       99.91
         19 |          1        0.01       99.92
         21 |          1        0.01       99.93
         39 |          1        0.01       99.94
         41 |          1        0.01       99.95
         51 |          1        0.01       99.96
         54 |          1        0.01       99.97
         73 |          1        0.01       99.98
         87 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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