Frequencies for first 10,000 rows of pct012c075 variable in sf12010860us22 dataset :

   72 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,437       94.37       94.37
          1 |        439        4.39       98.76
          2 |         76        0.76       99.52
          3 |         24        0.24       99.76
          4 |          9        0.09       99.85
          5 |          4        0.04       99.89
          7 |          3        0.03       99.92
          8 |          1        0.01       99.93
         11 |          1        0.01       99.94
         12 |          1        0.01       99.95
         13 |          1        0.01       99.96
         15 |          1        0.01       99.97
         23 |          1        0.01       99.98
         25 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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