Frequencies for first 10,000 rows of pct012c133 variable in sf12000860us18 dataset :

   26 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,749       87.49       87.49
          1 |        830        8.30       95.79
          2 |        228        2.28       98.07
          3 |         93        0.93       99.00
          4 |         39        0.39       99.39
          5 |         22        0.22       99.61
          6 |         10        0.10       99.71
          7 |         10        0.10       99.81
          8 |          3        0.03       99.84
          9 |          1        0.01       99.85
         11 |          2        0.02       99.87
         12 |          1        0.01       99.88
         15 |          1        0.01       99.89
         16 |          1        0.01       99.90
         17 |          1        0.01       99.91
         22 |          1        0.01       99.92
         23 |          1        0.01       99.93
         28 |          1        0.01       99.94
         33 |          1        0.01       99.95
         36 |          1        0.01       99.96
         58 |          1        0.01       99.97
         68 |          1        0.01       99.98
         80 |          1        0.01       99.99
         89 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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