Frequencies for first 10,000 rows of pct012c036 variable in sf12010860us22 dataset :

   33 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,447       84.47       84.47
          1 |        974        9.74       94.21
          2 |        273        2.73       96.94
          3 |        130        1.30       98.24
          4 |         68        0.68       98.92
          5 |         31        0.31       99.23
          6 |         27        0.27       99.50
          7 |         14        0.14       99.64
          8 |          7        0.07       99.71
          9 |          3        0.03       99.74
         10 |          4        0.04       99.78
         11 |          4        0.04       99.82
         12 |          1        0.01       99.83
         13 |          4        0.04       99.87
         14 |          1        0.01       99.88
         15 |          1        0.01       99.89
         16 |          1        0.01       99.90
         17 |          2        0.02       99.92
         18 |          1        0.01       99.93
         35 |          2        0.02       99.95
         36 |          1        0.01       99.96
         44 |          1        0.01       99.97
         52 |          1        0.01       99.98
         56 |          1        0.01       99.99
         87 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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