Frequencies for first 10,000 rows of pct012c003 variable in sf12000860us18 dataset :

    Under 1 |
       year |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,748       87.48       87.48
          1 |        810        8.10       95.58
          2 |        232        2.32       97.90
          3 |         81        0.81       98.71
          4 |         39        0.39       99.10
          5 |         30        0.30       99.40
          6 |         12        0.12       99.52
          7 |          6        0.06       99.58
          8 |          1        0.01       99.59
          9 |          7        0.07       99.66
         10 |         11        0.11       99.77
         11 |          4        0.04       99.81
         12 |          3        0.03       99.84
         13 |          1        0.01       99.85
         14 |          2        0.02       99.87
         16 |          1        0.01       99.88
         18 |          1        0.01       99.89
         19 |          1        0.01       99.90
         20 |          1        0.01       99.91
         24 |          1        0.01       99.92
         28 |          1        0.01       99.93
         37 |          1        0.01       99.94
         45 |          1        0.01       99.95
         53 |          1        0.01       99.96
         62 |          1        0.01       99.97
         66 |          1        0.01       99.98
         82 |          1        0.01       99.99
        103 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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