Frequencies for first 10,000 rows of drugres1 variable in person dataset : DRUG TEST | RESULTS-1 | Freq. Percent Cum. ------------+----------------------------------- 0 | 6,802 68.02 68.02 1 | 1,117 11.17 79.19 100 | 4 0.04 79.23 116 | 1 0.01 79.24 118 | 1 0.01 79.25 128 | 2 0.02 79.27 154 | 1 0.01 79.28 155 | 8 0.08 79.36 167 | 7 0.07 79.43 177 | 4 0.04 79.47 187 | 5 0.05 79.52 208 | 6 0.06 79.58 300 | 2 0.02 79.60 301 | 1 0.01 79.61 303 | 3 0.03 79.64 304 | 8 0.08 79.72 308 | 4 0.04 79.76 313 | 1 0.01 79.77 321 | 18 0.18 79.95 343 | 3 0.03 79.98 351 | 9 0.09 80.07 358 | 8 0.08 80.15 367 | 1 0.01 80.16 401 | 54 0.54 80.70 402 | 15 0.15 80.85 407 | 31 0.31 81.16 417 | 33 0.33 81.49 423 | 1 0.01 81.50 510 | 1 0.01 81.51 600 | 10 0.10 81.61 603 | 15 0.15 81.76 605 | 1 0.01 81.77 606 | 14 0.14 81.91 695 | 4 0.04 81.95 996 | 61 0.61 82.56 997 | 216 2.16 84.72 998 | 1 0.01 84.73 999 | 1,527 15.27 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016