Frequencies for first 10,000 rows of chow_cnt variable in pos2013 dataset :

 CHOW Count |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,462       64.62       64.62
          1 |      1,439       14.39       79.01
          2 |        974        9.74       88.75
          3 |        395        3.95       92.70
          4 |        304        3.04       95.74
          5 |        183        1.83       97.57
          6 |        107        1.07       98.64
          7 |         60        0.60       99.24
          8 |         32        0.32       99.56
          9 |         15        0.15       99.71
         10 |         13        0.13       99.84
         11 |          7        0.07       99.91
         12 |          4        0.04       99.95
         13 |          4        0.04       99.99
         14 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016