Frequencies for first 10,000 rows of state variable in zipcode2013 dataset :

  The State |
 associated |
   with the |
   ZIP code |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |          6        0.06        0.06
         AL |          6        0.06        0.12
         AR |          6        0.06        0.18
         AZ |          6        0.06        0.24
         CA |          6        0.06        0.30
         CO |          6        0.06        0.36
         CT |      1,384       13.84       14.20
         DC |          6        0.06       14.26
         DE |          6        0.06       14.32
         FL |          6        0.06       14.38
         GA |          6        0.06       14.44
         HI |          6        0.06       14.50
         IA |          6        0.06       14.56
         ID |          6        0.06       14.62
         IL |          6        0.06       14.68
         IN |          6        0.06       14.74
         KS |          6        0.06       14.80
         KY |          6        0.06       14.86
         LA |          6        0.06       14.92
         MA |      2,892       28.92       43.84
         MD |          6        0.06       43.90
         ME |      2,220       22.20       66.10
         MI |          6        0.06       66.16
         MN |          6        0.06       66.22
         MO |          6        0.06       66.28
         MS |          6        0.06       66.34
         MT |          6        0.06       66.40
         NC |          6        0.06       66.46
         ND |          6        0.06       66.52
         NE |          6        0.06       66.58
         NH |      1,386       13.86       80.44
         NJ |          6        0.06       80.50
         NM |          6        0.06       80.56
         NV |          6        0.06       80.62
         NY |          6        0.06       80.68
         OH |          6        0.06       80.74
         OK |          6        0.06       80.80
         OR |          6        0.06       80.86
         PA |          6        0.06       80.92
         RI |        420        4.20       85.12
         SC |          6        0.06       85.18
         SD |          6        0.06       85.24
         TN |          6        0.06       85.30
         TX |          6        0.06       85.36
         UT |          6        0.06       85.42
         VA |          6        0.06       85.48
         VT |      1,428       14.28       99.76
         WA |          6        0.06       99.82
         WI |          6        0.06       99.88
         WV |          6        0.06       99.94
         WY |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jun 2017