Frequencies for first 10,000 rows of pct012c034 variable in sf12000860us18 dataset :

   31 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,478       84.78       84.78
          1 |      1,057       10.57       95.35
          2 |        260        2.60       97.95
          3 |         89        0.89       98.84
          4 |         39        0.39       99.23
          5 |         28        0.28       99.51
          6 |          9        0.09       99.60
          7 |          9        0.09       99.69
          8 |         10        0.10       99.79
          9 |          4        0.04       99.83
         10 |          2        0.02       99.85
         11 |          2        0.02       99.87
         12 |          2        0.02       99.89
         13 |          1        0.01       99.90
         15 |          1        0.01       99.91
         17 |          1        0.01       99.92
         18 |          2        0.02       99.94
         30 |          1        0.01       99.95
         38 |          1        0.01       99.96
         51 |          1        0.01       99.97
         52 |          1        0.01       99.98
         55 |          1        0.01       99.99
         62 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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