Frequencies for first 10,000 rows of pct012n048 variable in sf12000860us29 dataset :

   45 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,337       93.37       93.37
          1 |        450        4.50       97.87
          2 |        109        1.09       98.96
          3 |         34        0.34       99.30
          4 |         21        0.21       99.51
          5 |          7        0.07       99.58
          6 |         12        0.12       99.70
          7 |          8        0.08       99.78
          8 |          5        0.05       99.83
          9 |          2        0.02       99.85
         10 |          6        0.06       99.91
         11 |          1        0.01       99.92
         12 |          2        0.02       99.94
         15 |          1        0.01       99.95
         17 |          1        0.01       99.96
         23 |          1        0.01       99.97
         26 |          1        0.01       99.98
         30 |          1        0.01       99.99
         32 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017