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

  The State |
    Federal |
Information |
 Processing |
     System |
(FIPS) code |      Freq.     Percent        Cum.
------------+-----------------------------------
         01 |          6        0.06        0.06
         02 |          6        0.06        0.12
         04 |          6        0.06        0.18
         05 |          6        0.06        0.24
         06 |          6        0.06        0.30
         08 |          6        0.06        0.36
         09 |      1,384       13.84       14.20
         10 |          6        0.06       14.26
         11 |          6        0.06       14.32
         12 |          6        0.06       14.38
         13 |          6        0.06       14.44
         15 |          6        0.06       14.50
         16 |          6        0.06       14.56
         17 |          6        0.06       14.62
         18 |          6        0.06       14.68
         19 |          6        0.06       14.74
         20 |          6        0.06       14.80
         21 |          6        0.06       14.86
         22 |          6        0.06       14.92
         23 |      2,220       22.20       37.12
         24 |          6        0.06       37.18
         25 |      2,892       28.92       66.10
         26 |          6        0.06       66.16
         27 |          6        0.06       66.22
         28 |          6        0.06       66.28
         29 |          6        0.06       66.34
         30 |          6        0.06       66.40
         31 |          6        0.06       66.46
         32 |          6        0.06       66.52
         33 |      1,386       13.86       80.38
         34 |          6        0.06       80.44
         35 |          6        0.06       80.50
         36 |          6        0.06       80.56
         37 |          6        0.06       80.62
         38 |          6        0.06       80.68
         39 |          6        0.06       80.74
         40 |          6        0.06       80.80
         41 |          6        0.06       80.86
         42 |          6        0.06       80.92
         44 |        420        4.20       85.12
         45 |          6        0.06       85.18
         46 |          6        0.06       85.24
         47 |          6        0.06       85.30
         48 |          6        0.06       85.36
         49 |          6        0.06       85.42
         50 |      1,428       14.28       99.70
         51 |          6        0.06       99.76
         53 |          6        0.06       99.82
         54 |          6        0.06       99.88
         55 |          6        0.06       99.94
         56 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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