Frequencies for first 10,000 rows of pct012c120 variable in sf12000860us18 dataset :

   13 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,649       86.49       86.49
          1 |        904        9.04       95.53
          2 |        237        2.37       97.90
          3 |         90        0.90       98.80
          4 |         41        0.41       99.21
          5 |         23        0.23       99.44
          6 |         16        0.16       99.60
          7 |          7        0.07       99.67
          8 |          7        0.07       99.74
          9 |          5        0.05       99.79
         10 |          2        0.02       99.81
         11 |          2        0.02       99.83
         12 |          2        0.02       99.85
         13 |          1        0.01       99.86
         14 |          3        0.03       99.89
         15 |          1        0.01       99.90
         28 |          1        0.01       99.91
         29 |          1        0.01       99.92
         30 |          1        0.01       99.93
         33 |          1        0.01       99.94
         34 |          1        0.01       99.95
         52 |          1        0.01       99.96
         55 |          1        0.01       99.97
         65 |          1        0.01       99.98
         70 |          1        0.01       99.99
         84 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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