Frequencies for first 10,000 rows of pct012o176 variable in sf12000860us30 dataset :

   69 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,618       86.18       86.18
          1 |        926        9.26       95.44
          2 |        246        2.46       97.90
          3 |         86        0.86       98.76
          4 |         49        0.49       99.25
          5 |         28        0.28       99.53
          6 |         14        0.14       99.67
          7 |         11        0.11       99.78
          8 |         11        0.11       99.89
          9 |          3        0.03       99.92
         10 |          2        0.02       99.94
         11 |          3        0.03       99.97
         12 |          1        0.01       99.98
         13 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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