Frequencies for first 10,000 rows of state variable in zipcode2015 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 | 1,402 14.02 14.38 DC | 6 0.06 14.44 DE | 6 0.06 14.50 FL | 6 0.06 14.56 GA | 6 0.06 14.62 HI | 6 0.06 14.68 IA | 6 0.06 14.74 ID | 6 0.06 14.80 IL | 6 0.06 14.86 IN | 6 0.06 14.92 KS | 6 0.06 14.98 KY | 6 0.06 15.04 LA | 6 0.06 15.10 MA | 2,886 28.86 43.96 MD | 6 0.06 44.02 ME | 2,214 22.14 66.16 MI | 6 0.06 66.22 MN | 6 0.06 66.28 MO | 6 0.06 66.34 MS | 6 0.06 66.40 MT | 6 0.06 66.46 NC | 6 0.06 66.52 ND | 6 0.06 66.58 NE | 6 0.06 66.64 NH | 1,386 13.86 80.50 NJ | 6 0.06 80.56 NM | 6 0.06 80.62 NV | 6 0.06 80.68 NY | 6 0.06 80.74 OH | 6 0.06 80.80 OK | 6 0.06 80.86 OR | 6 0.06 80.92 PA | 6 0.06 80.98 RI | 420 4.20 85.18 SC | 6 0.06 85.24 SD | 6 0.06 85.30 TN | 6 0.06 85.36 TX | 6 0.06 85.42 UT | 6 0.06 85.48 VA | 6 0.06 85.54 VT | 1,422 14.22 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 , 20 Dec 2017