Frequencies for first 10,000 rows of drugres2 variable in person dataset : DRUG TEST | RESULTS-2 | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,660 96.60 96.60 1 | 28 0.28 96.88 154 | 1 0.01 96.89 155 | 3 0.03 96.92 167 | 1 0.01 96.93 177 | 2 0.02 96.95 187 | 8 0.08 97.03 189 | 2 0.02 97.05 208 | 2 0.02 97.07 300 | 1 0.01 97.08 303 | 1 0.01 97.09 304 | 4 0.04 97.13 313 | 1 0.01 97.14 321 | 4 0.04 97.18 324 | 1 0.01 97.19 329 | 1 0.01 97.20 334 | 1 0.01 97.21 337 | 1 0.01 97.22 343 | 4 0.04 97.26 348 | 6 0.06 97.32 351 | 2 0.02 97.34 358 | 1 0.01 97.35 367 | 1 0.01 97.36 376 | 1 0.01 97.37 387 | 2 0.02 97.39 401 | 17 0.17 97.56 402 | 4 0.04 97.60 405 | 1 0.01 97.61 407 | 42 0.42 98.03 410 | 6 0.06 98.09 417 | 78 0.78 98.87 495 | 1 0.01 98.88 600 | 5 0.05 98.93 603 | 8 0.08 99.01 605 | 5 0.05 99.06 606 | 16 0.16 99.22 695 | 8 0.08 99.30 996 | 33 0.33 99.63 997 | 7 0.07 99.70 999 | 30 0.30 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016