The Irish capital Dublin has the most expensive cannabis in Europe, while Belgium’s Antwerp has the cheapest, according to a new index that looks at the cost and consumption of the drug in 120 cities around the world.

A gram of cannabis in Dublin carries a price tag of $21.63 (€17.37), compared to  $4.29 (€3.45) in Antwerp, according to the 2018 Cannabis Price Index produced by Seedo, an automatic cultivator device company.

Cannabis is illegal in Ireland, while in Belgium a directive was issued in 2003 allowing for possession of the drug in small quantities to be decriminalised if the individual was over the age of 18, was not a problem drug user or involved in public nuisance.

Of the European Union cities included in the index, Belfast followed. Dublin with a cost of $15.81 (€12.70) per gram, and Athens came in third at $14.95 (€12.01).

Spain’s Barcelona and Ljubljana in Slovenia followed Antwerp as the cheapest. EU cities for cannabis, selling it for $6.23 (€5) and $6.32 (€5.08) respectively.

Out of all 120 cities include in the study, cannabis was find to be cheapest in Ecuador’s. Quito at $1.34 (€1.08) and most expensive in the Japanese capital Tokyo. Where it carries a price tag of $32.66 (€26.24) per gram. The figures were reach based on prices submit by cannabis users to crowdsourcing websites.