Frequencies for first 10,000 rows of drugres1 variable in person dataset : DRUG TEST | RESULTS-1 | Freq. Percent Cum. ------------+----------------------------------- 0 | 7,676 76.76 76.76 1 | 1,231 12.31 89.07 100 | 4 0.04 89.11 117 | 1 0.01 89.12 128 | 11 0.11 89.23 136 | 2 0.02 89.25 154 | 1 0.01 89.26 155 | 13 0.13 89.39 165 | 3 0.03 89.42 167 | 8 0.08 89.50 177 | 6 0.06 89.56 187 | 12 0.12 89.68 189 | 6 0.06 89.74 208 | 4 0.04 89.78 213 | 1 0.01 89.79 227 | 1 0.01 89.80 229 | 1 0.01 89.81 295 | 1 0.01 89.82 300 | 13 0.13 89.95 303 | 1 0.01 89.96 304 | 20 0.20 90.16 308 | 2 0.02 90.18 312 | 1 0.01 90.19 313 | 1 0.01 90.20 316 | 1 0.01 90.21 321 | 16 0.16 90.37 334 | 8 0.08 90.45 342 | 1 0.01 90.46 348 | 7 0.07 90.53 351 | 7 0.07 90.60 352 | 2 0.02 90.62 358 | 1 0.01 90.63 367 | 3 0.03 90.66 387 | 1 0.01 90.67 401 | 106 1.06 91.73 402 | 55 0.55 92.28 405 | 2 0.02 92.30 407 | 37 0.37 92.67 409 | 1 0.01 92.68 410 | 2 0.02 92.70 417 | 52 0.52 93.22 418 | 1 0.01 93.23 423 | 1 0.01 93.24 513 | 3 0.03 93.27 522 | 1 0.01 93.28 600 | 16 0.16 93.44 601 | 1 0.01 93.45 603 | 18 0.18 93.63 605 | 6 0.06 93.69 606 | 45 0.45 94.14 695 | 29 0.29 94.43 702 | 1 0.01 94.44 810 | 1 0.01 94.45 996 | 23 0.23 94.68 997 | 342 3.42 98.10 998 | 9 0.09 98.19 999 | 181 1.81 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 18 Apr 2016