Frequencies for first 10,000 rows of drugres2 variable in person dataset : DRUG TEST | RESULTS-2 | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,508 95.08 95.08 128 | 2 0.02 95.10 151 | 1 0.01 95.11 155 | 8 0.08 95.19 167 | 1 0.01 95.20 177 | 5 0.05 95.25 187 | 8 0.08 95.33 188 | 1 0.01 95.34 189 | 6 0.06 95.40 300 | 2 0.02 95.42 303 | 3 0.03 95.45 304 | 10 0.10 95.55 313 | 1 0.01 95.56 321 | 9 0.09 95.65 340 | 1 0.01 95.66 342 | 1 0.01 95.67 343 | 1 0.01 95.68 348 | 6 0.06 95.74 351 | 5 0.05 95.79 352 | 1 0.01 95.80 358 | 4 0.04 95.84 367 | 2 0.02 95.86 376 | 1 0.01 95.87 387 | 1 0.01 95.88 401 | 14 0.14 96.02 402 | 22 0.22 96.24 405 | 1 0.01 96.25 407 | 32 0.32 96.57 410 | 4 0.04 96.61 417 | 113 1.13 97.74 513 | 1 0.01 97.75 522 | 1 0.01 97.76 600 | 10 0.10 97.86 603 | 8 0.08 97.94 605 | 2 0.02 97.96 606 | 44 0.44 98.40 695 | 9 0.09 98.49 702 | 1 0.01 98.50 996 | 34 0.34 98.84 997 | 9 0.09 98.93 999 | 107 1.07 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016