Frequencies for first 10,000 rows of pct012o037 variable in sf12010860us34 dataset :

   34 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,094       70.94       70.94
          1 |      1,300       13.00       83.94
          2 |        624        6.24       90.18
          3 |        311        3.11       93.29
          4 |        207        2.07       95.36
          5 |        144        1.44       96.80
          6 |        103        1.03       97.83
          7 |         57        0.57       98.40
          8 |         45        0.45       98.85
          9 |         39        0.39       99.24
         10 |         24        0.24       99.48
         11 |         15        0.15       99.63
         12 |          8        0.08       99.71
         13 |          4        0.04       99.75
         14 |          9        0.09       99.84
         15 |          4        0.04       99.88
         17 |          4        0.04       99.92
         18 |          4        0.04       99.96
         19 |          1        0.01       99.97
         20 |          1        0.01       99.98
         24 |          1        0.01       99.99
         38 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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