Table 2.

Variation over time of relative popularity indexes (%) for drugs found by Google search, by date.

		May 1, 2012	October 1, 2012	January 1, 2013	July 1, 2013	February 1, 2014	June 20, 2014
max(Ni)a		42,600,000	55,800,000	61,900,000	68,400,000	85,600,000	389,000,000
Drug
	Alcohol	100	100	100	100	100	100
	Cannabis	6.3	5.9	6.9	7.7	10.1	15.2
	Cocaine	10.5	9.4	10.3	10.4	11.4	15.1
	LSDb	6.4	6.8	7.9	8.8	8.8	12.5
	Heroin	8.8	9.1	10.0	10.4	11.0	12.0
	Ecstasy	6.2	5.1	5.6	6.1	6.6	11.0
	GHBc	0.9	1.1	1.3	1.5	1.7	6.0
	Methadone	1.8	2.1	2.2	2.0	1.7	3.4
	Butane	1.8	2.1	2.3	2.3	2.2	3.0
	Khat	1.3	1.2	1.3	1.4	1.6	2.7
	Amphetamine	1.2	1.5	2.2	1.6	1.6	2.3
	Methamphetamine	1.5	1.6	1.6	1.6	1.6	2.3
	Ketamine	2.6	2.3	2.2	1.9	1.6	2.2
	Buprenorphine	1.0	0.6	0.6	0.6	0.5	1.6
	Benzodiazepines	1.7	1.3	1.3	1.2	1.0	1.2
	Mephedrone	0.1	0.1	0.1	0.1	0.1	0.5

^amax(N_i): drug with the highest frequency of hits (highest number of websites where that keyword is found).

^bLSD: lysergic acid diethylamide.

^cGHB: gamma-hydroxybutyric acid.