Frequencies for first 10,000 rows of pct012c150 variable in sf12000860us18 dataset :

   43 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,491       84.91       84.91
          1 |      1,031       10.31       95.22
          2 |        290        2.90       98.12
          3 |         90        0.90       99.02
          4 |         44        0.44       99.46
          5 |         17        0.17       99.63
          6 |         12        0.12       99.75
          7 |          6        0.06       99.81
          8 |          3        0.03       99.84
          9 |          3        0.03       99.87
         10 |          2        0.02       99.89
         11 |          1        0.01       99.90
         19 |          1        0.01       99.91
         20 |          1        0.01       99.92
         23 |          1        0.01       99.93
         33 |          3        0.03       99.96
         35 |          1        0.01       99.97
         66 |          1        0.01       99.98
         70 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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