Frequencies for first 10,000 rows of statefips variable in zipcode2015 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 | 1,402 14.02 14.38 10 | 6 0.06 14.44 11 | 6 0.06 14.50 12 | 6 0.06 14.56 13 | 6 0.06 14.62 15 | 6 0.06 14.68 16 | 6 0.06 14.74 17 | 6 0.06 14.80 18 | 6 0.06 14.86 19 | 6 0.06 14.92 20 | 6 0.06 14.98 21 | 6 0.06 15.04 22 | 6 0.06 15.10 23 | 2,214 22.14 37.24 24 | 6 0.06 37.30 25 | 2,886 28.86 66.16 26 | 6 0.06 66.22 27 | 6 0.06 66.28 28 | 6 0.06 66.34 29 | 6 0.06 66.40 30 | 6 0.06 66.46 31 | 6 0.06 66.52 32 | 6 0.06 66.58 33 | 1,386 13.86 80.44 34 | 6 0.06 80.50 35 | 6 0.06 80.56 36 | 6 0.06 80.62 37 | 6 0.06 80.68 38 | 6 0.06 80.74 39 | 6 0.06 80.80 40 | 6 0.06 80.86 41 | 6 0.06 80.92 42 | 6 0.06 80.98 44 | 420 4.20 85.18 45 | 6 0.06 85.24 46 | 6 0.06 85.30 47 | 6 0.06 85.36 48 | 6 0.06 85.42 49 | 6 0.06 85.48 50 | 1,422 14.22 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 , 20 Dec 2017