Table GPS-1. Lifetime prevalence of drug use by age and country, most recent national general population survey available since 2000 [see all tables in this series...]

Part (i) Survey methods

Country		Geographical area	Year	Reference	Collection method	Original age range	Original sample size	Age range all adults	Sample size all adults	Age range young adults	Sample size young adults
Belgium		National	2008	(7)	Interview	All ages	11254	15–64	6792	15–34	2550
Bulgaria		National	2008	(3)	Interview	15–64	5139	15–64	5139	15–34	2164
Czech Republic		National	2009	(5)	Interview	15+	1795	15–64	1486	15–34	616
Denmark		National	2010	(6)	Interview	16+	15165	16–64	11611	16–34	3381
Germany		National	2009	(8)	Multimethod	18–64	8030	18–64	8030	18–34	3876
Estonia		National	2008	(3)	Mail	15–69	:	15–64	1401	15–34	545
Ireland		National	2006–07	(5)	Interview	15–64	4967	15–64	:	15–34	:
Greece		National (except Aegean and Ionian Islands)	2004	(3)	Interview	12–64	4781	15–64	4351	15–34	2620
Spain		National	2009	(8)	Interview	15–64	20109	15–64	20109	15–34	:
France		National	2005	(6)	Phone	12–75	30514	15–64	25879	15–34	10855
Italy		National	2008	(4)	Mail	15–64	10940	15–64	10940	15–34	6398
Cyprus		National	2009	(2)	Interview	15–64	3385	15–64	3385	15–34	1810
Latvia		National	2007	(2)	Interview	15–64	4500	15–64	4500	15–34	2497
Lithuania		National	2008	(2)	Interview	15–64	4777	15–64	4777	15–34	2152
Luxembourg		:	:	:	:	:	:	:	:	:	:
Hungary		National	2007	(3)	Interview	18–64	2710	18–64	2710	18-34	1111
Malta		National	2001	(1)	Interview	18–64	2828	18–64	1755	18–34	640
Netherlands		National	2005	(3)	Interview	15–64	4516	15–64	4516	15–34	:
Austria		National	2008	(2)	Interview	15-93	4196	15–64	3761	15–34	2558
Poland		National	2006	(2)	Interview	15–64	2859	15–64	2859	15–34	2031
Portugal		National	2007	(2)	Interview	15–64	12202	15–64	12202	15–34	4765
Romania		National	2007	(2)	Interview	15–64	6797	15–64	6797	15–34	2262
Slovenia		National	2007	(1)	Interview	15+	2117	15–64	1724	15–34	691
Slovakia		National	2006	(6)	Interview	15–64	1305	15–64	1305	15–34	556
Finland		National	2006	(7)	Mail	15–69	3029	15–64	2802	15–34	1387
Sweden		National	2008	(5)	Multimethod	15–64	22095	15–64	22095	15–34	16271
Sweden		National	2010	(12)	Mail	16–84	10067	16-64	7315	16-34	2196
United Kingdom		England and Wales	2009-10	(13)	Interview	16-59	26199	16-59	26199	16-34	8945
United Kingdom		Northern Ireland	2008-09	(18)	Interview	16–64	2438	16–64	2438	16-34	805
United Kingdom		Scotland	2008-09	(22)	Interview	16+	10974	16–59	8488	16–34	2485
United Kingdom		United Kingdom	2006	(24)	:	16-59	:	16–59	:	16–34	:
Croatia		:	:	:	:	:	:	:	:	:	:
Turkey		:	:	:	:	:	:	:	:	:	:
Norway		National	2009	(3)	Interview	15+	2073	15–64	1624	15–34	632

Notes:

 This table presents the methods and results for the last surveys available in each country. The number indicated in the column ‘Ref.’ is the reference to the corresponding survey in the table presenting all surveys available for each country Table GPS-0. 

 This table aims to present an overview of national surveys. Exceptionally, some relevant regional surveys are presented. Some city surveys reported by countries were not included as they tend to produce higher prevalence estimates which are not comparable with estimates for whole countries (or large regions with both urban and rural areas). Athens was included as a reference point for the 1993 survey. 

 ‘Data collection' means 'data collection method used in the survey': 'interview' (face-to-face interview, which may include self-completed sections for the more sensitive questions, also it may include CAPI — computer assisted interviews), 'phone' (telephone interview), 'mail' (mailed questionnaire), 'Multimethod' (Multi-Method — simultaneous use of interview, mail or internet in the same survey).  

  'Survey sample' refers to the number of actual respondents to the survey (Net sample). In some cases, national surveys cover originally a broader age range ('original age range') than that presented here for the standard groups 'All adults'(15–64) and 'Young adults' (15–34). Sample sizes are presented respectively for the 'original age range', the 'all adults' and 'young adults' groups.  

 In surveys with small sample sizes results should be interpreted with caution. 

 Countries were asked to report results using, as far as possible, EMCDDA standard age groups (all adults: 15–64, young adults: 15–34). In countries where age ranges are more restrictive, prevalence estimates may tend to be slightly higher. Some countries have recalculated their prevalence figures using the EMCDDA standard age groups. 

 For methods and definitions on population surveys in general, see General population surveys of drug use – methods and definitions.  

 See also 'General notes for interpreting data' on the Explanatory notes and help page. 

Sources:

 See Table GPS-0. 

 For more details on methodological features for each survey, see Table GPS-121. 

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