Frequencies for length variable in fhouse2002 dataset :

     format |
     length |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          1        1.09        1.09
          7 |         13       14.13       15.22
          9 |          9        9.78       25.00
         15 |         13       14.13       39.13
         25 |         26       28.26       67.39
         28 |          6        6.52       73.91
         29 |          3        3.26       77.17
         38 |          8        8.70       85.87
         46 |         13       14.13      100.00
------------+-----------------------------------
      Total |         92      100.00

by Jean Roth , jroth@nber.org , 10 May 2016