| % | KI | ||
| 1986 | ![]() | 0.7 | 0.1-3.8 |
![]() | 0.1 | 0.0-0.5 | |
| 1994 | ![]() | 0.8 | 0.4-1.8 |
![]() | 0.9 | 0.4-2.0 | |
| 1998 | ![]() | 0.7 | 0.3-1.6 |
![]() | 0.1 | 0.0-0.9 | |
| 2002 | ![]() | 1.1 | 0.6-2.0 |
![]() | 1.0 | 0.5-1.9 | |
| 2006 | ![]() | 0.6 | 0.3-1.5 |
![]() | 0.8 | 0.4-1.6 | |
| 2010 | ![]() | 0.9 | 0.5-1.8 |
![]() | 0.7 | 1.3-1.5 | |
| 2014 | ![]() | 0.2 | 0.1-0.9 |
![]() | 1.0 | 0.6-2.0 | |
| 2018 | ![]() | 0.7 | 0.3-1.7 |
![]() | 0.5 | 0.2-1.3 | |
| Fragen: | "Hast du schon einmal oder mehrmals in deinem Leben Stoffe dieser Art [Heroin, Opium] genommen?" |
| Anmerkungen: | KI: 95% Konfidenzintervall. |
| Quelle: | Delgrande Jordan, Schneider et al. (2019) |