Frequencies for first 10,000 rows of zipcodes variable in servarea2017 dataset : Zip Codes | Freq. Percent Cum. ----------------------------------------+----------------------------------- | 9,885 98.85 98.85 20120, 20121, 20122, 20124, 20151, 20.. | 1 0.01 98.86 48001, 48004, 48005, 48022, 48023, 48.. | 1 0.01 98.87 48007, 48009, 48012, 48017, 48025, 48.. | 1 0.01 98.88 48007, 48009, 48012, 48017, 48025, 48.. | 1 0.01 98.89 48007, 48009, 48012, 48017, 48025, 48.. | 1 0.01 98.90 48014, 48412, 48416, 48421, 48435, 48.. | 4 0.04 98.94 48015, 48021, 48026, 48035, 48036, 48.. | 1 0.01 98.95 48015, 48021, 48080, 48081, 48082, 48.. | 1 0.01 98.96 48371, 48440, 48455, 48462 | 1 0.01 98.97 48401, 48410, 48419, 48422, 48426, 48.. | 1 0.01 98.98 48619, 48636, 48647 | 2 0.02 99.00 48627, 48630, 48651, 48656 | 2 0.02 99.02 48808, 48822, 48831, 48833, 48835, 48.. | 4 0.04 99.06 48811, 48818, 48829, 48834, 48838, 48.. | 2 0.02 99.08 48811, 48818, 48829, 48834, 48838, 48.. | 2 0.02 99.10 48827, 48842, 48854, 49251, 49264, 49.. | 4 0.04 99.14 49009, 49010, 49013, 49022, 49026, 49.. | 1 0.01 99.15 49011, 49014, 49015, 49016, 49017, 49.. | 1 0.01 99.16 49011, 49014, 49015, 49017, 49021, 49.. | 1 0.01 99.17 49301 | 2 0.02 99.19 49301, 49302, 49306, 49315, 49316, 49.. | 1 0.01 99.20 49315 | 2 0.02 99.22 49316 | 2 0.02 99.24 49331 | 2 0.02 99.26 49355 | 2 0.02 99.28 49356 | 2 0.02 99.30 49357 | 2 0.02 99.32 49418 | 2 0.02 99.34 49468 | 2 0.02 99.36 49501 | 2 0.02 99.38 49502 | 2 0.02 99.40 49503 | 2 0.02 99.42 49504 | 2 0.02 99.44 49505 | 2 0.02 99.46 49506 | 2 0.02 99.48 49507 | 2 0.02 99.50 49508 | 2 0.02 99.52 49509 | 2 0.02 99.54 49510 | 2 0.02 99.56 49512 | 2 0.02 99.58 49514 | 2 0.02 99.60 49515 | 2 0.02 99.62 49516 | 2 0.02 99.64 49518 | 2 0.02 99.66 49519 | 2 0.02 99.68 49523 | 2 0.02 99.70 49525 | 2 0.02 99.72 49528 | 2 0.02 99.74 49530 | 2 0.02 99.76 49534 | 2 0.02 99.78 49544 | 2 0.02 99.80 49546 | 2 0.02 99.82 49548 | 2 0.02 99.84 49555 | 2 0.02 99.86 49560 | 2 0.02 99.88 49588 | 2 0.02 99.90 49599 | 2 0.02 99.92 49622, 49627 | 2 0.02 99.94 54106, 54107, 54111, 54124, 54127, 54.. | 1 0.01 99.95 54408, 54409, 54414, 54416, 54427, 54.. | 1 0.01 99.96 77331, 77371 | 1 0.01 99.97 77340, 77341, 77342, 77343, 77344, 77.. | 1 0.01 99.98 77430, 77431, 77511, 77512, 77515, 77.. | 1 0.01 99.99 77514, 77560, 77580, 77597 | 1 0.01 100.00 ----------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 8 Dec 2017