Frequencies for first 10,000 rows of chow_cnt variable in posclia2017 dataset :

 CHOW Count |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,971       99.71       99.71
          1 |         13        0.13       99.84
          2 |         12        0.12       99.96
          3 |          1        0.01       99.97
          4 |          1        0.01       99.98
          5 |          1        0.01       99.99
          6 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018