Frequencies for first 10,000 rows of areacode variable in zipcode dataset : single area | code for | zip code. | Freq. Percent Cum. ------------+----------------------------------- 201 | 90 0.90 0.90 202 | 281 2.81 3.71 203 | 168 1.68 5.39 207 | 486 4.86 10.25 212 | 149 1.49 11.74 215 | 191 1.91 13.65 276 | 138 1.38 15.03 301 | 283 2.83 17.86 302 | 96 0.96 18.82 304 | 255 2.55 21.37 315 | 353 3.53 24.90 340 | 16 0.16 25.06 401 | 90 0.90 25.96 410 | 321 3.21 29.17 412 | 118 1.18 30.35 413 | 150 1.50 31.85 434 | 161 1.61 33.46 508 | 238 2.38 35.84 516 | 92 0.92 36.76 518 | 383 3.83 40.59 540 | 345 3.45 44.04 570 | 420 4.20 48.24 585 | 174 1.74 49.98 603 | 284 2.84 52.82 607 | 217 2.17 54.99 609 | 135 1.35 56.34 610 | 289 2.89 59.23 617 | 90 0.90 60.13 631 | 113 1.13 61.26 703 | 164 1.64 62.90 716 | 182 1.82 64.72 717 | 297 2.97 67.69 718 | 164 1.64 69.33 724 | 402 4.02 73.35 732 | 123 1.23 74.58 757 | 184 1.84 76.42 781 | 94 0.94 77.36 787 | 176 1.76 79.12 802 | 309 3.09 82.21 804 | 223 2.23 84.44 814 | 467 4.67 89.11 845 | 250 2.50 91.61 856 | 112 1.12 92.73 860 | 265 2.65 95.38 908 | 100 1.00 96.38 914 | 81 0.81 97.19 973 | 163 1.63 98.82 978 | 118 1.18 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 4 Jan 2016 tail -n+3 /homes/data/zip/sas/2013/desc/zipcode/byvar/tab/areacode.log | egrep