Frequencies for first 10,000 rows of pct012c140 variable in sf12000860us18 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,574       85.74       85.74
          1 |        960        9.60       95.34
          2 |        243        2.43       97.77
          3 |        109        1.09       98.86
          4 |         54        0.54       99.40
          5 |         14        0.14       99.54
          6 |         14        0.14       99.68
          7 |         10        0.10       99.78
          8 |          3        0.03       99.81
          9 |          4        0.04       99.85
         10 |          1        0.01       99.86
         11 |          2        0.02       99.88
         12 |          1        0.01       99.89
         14 |          1        0.01       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         21 |          1        0.01       99.93
         23 |          1        0.01       99.94
         28 |          1        0.01       99.95
         36 |          1        0.01       99.96
         44 |          1        0.01       99.97
         63 |          1        0.01       99.98
         65 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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