Frequencies for first 10,000 rows of uniqueplandesign variable in plan2018 dataset :

Unique Plan |
     Design |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,596       15.96       15.96
         No |      6,726       67.26       83.22
        Yes |      1,678       16.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 23 May 2018