Frequencies for first 10,000 rows of state variable in zipcode2005 dataset :

  The State |
 associated |
   with the |
   ZIP code |      Freq.     Percent        Cum.
------------+-----------------------------------
         MA |      3,972       39.72       39.72
         ME |      2,856       28.56       68.28
         NH |      1,626       16.26       84.54
         RI |        540        5.40       89.94
         VT |      1,006       10.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Jun 2017