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Table 1 Hierarchical classification of the first-time illicit drug offenders in Taiwan, 2001–2017

From: The impact of Taiwan’s implementation of a nationwide harm reduction program in 2006 on the use of various illicit drugs: trend analysis of first-time offenders from 2001 to 2017

  First-time offenders Heroin Methamphetamine Ecstasy Ketamine (CRPS) Ketamine (APS) Others
Year N R (/105)a n R (/105)a n R (/105)a n R (/105)a n R (/105)a n R (/105)a n
2001 14,255 91.39 6928 50.00 5518 40.21 1191 8.93 0 0.00 618
2002 21,423 173.49 10,992 78.90 5963 43.24 3534 26.72 98 0.74 836
2003 16,963 137.26 9422 67.32 4493 32.34 2240 17.07 124 0.93 684
2004 18,974 153.62 9977 70.94 6369 45.72 1760 13.58 194 1.50 674
2005 18,347 146.64 8984 63.40 7410 53.31 1205 9.44 140 1.09 608
2006 13,884 108.45 6936 48.31 4722 33.74 1420 11.27 219 1.70 587
2007 13,974 109.38 5429 37.65 6475 46.72 1046 8.30 389 3.10 635
2008 11,034 86.34 3857 26.50 5022 36.42 1081 8.61 482 3.93 592
2009 12,176 97.25 3053 20.93 6188 45.61 1282 10.33 855 7.12 289 2.42 509
2010 16,538 137.15 2207 15.19 7926 58.77 970 7.88 945 8.03 3975 33.36 515
2011 15,976 135.39 1561 10.63 6689 49.50 1158 9.53 948 8.14 5208 43.90 412
2012 17,201 148.53 1175 8.00 5966 44.26 1254 10.38 1339 11.69 7253 61.54 214
2013 17,663 155.31 916 6.17 5251 38.98 1156 9.39 1191 10.36 8756 74.11 393
2014 13,185 112.34 748 5.01 5110 38.11 594 4.81 887 7.76 5610 48.08 236
2015 15,486 131.06 863 5.89 6976 52.73 703 5.91 1032 9.09 5600 48.36 312
2016 12,382 104.15 724 4.82 7204 54.82 492 4.17 547 4.86 2977 25.76 438
2017 11,623 96.69 800 4.42 7001 52.83 399 3.44 485 4.41 2416 21.32 522
  1. a Age-standardized first-time offense rate using the World Standard population (WHO 2000–2025) [26], truncated to the age range between 18 and 69 years, as the weighting for the population (18–24 years: 18.24%; 25–29 years: 12.49%; 30–39 years: 23.24%; 40–49 years: 19.89%; 50–59 years: 15.62%; and 60–69 years: 10.52%)