Frequencies for chaincity variable in hcris2552_96_2011 dataset :

       chaincity |      Freq.     Percent        Cum.
-----------------+-----------------------------------
                 |         17       50.00       50.00
     ALBUQUERQUE |          1        2.94       52.94
      BIRMINGHAM |          1        2.94       55.88
       BRENTWOOD |          1        2.94       58.82
       CHARLOTTE |          1        2.94       61.76
        FRANKLIN |          3        8.82       70.59
         HOUSTON |          2        5.88       76.47
       LA CROSSE |          1        2.94       79.41
      LOUISVILLE |          2        5.88       85.29
   MECHANICSBURG |          1        2.94       88.24
       NASHVILLE |          1        2.94       91.18
   OKLAHOMA CITY |          1        2.94       94.12
RANCHO CUCAMONGA |          1        2.94       97.06
          TACOMA |          1        2.94      100.00
-----------------+-----------------------------------
           Total |         34      100.00

by Jean Roth , jroth@nber.org , 2 Sep 2018