Barcelona 2,606 Berlin 6,511 Brussels 2,160 Buenos Aires 21,905 Hong Kong 4,284 London 19,000 Los Angeles 12,268 Madrid 4,726 Montreal 22,123 Moscow 10,599 New York 3,428 Oslo 7,284 Paris 17,505 Rio de Janeiro - Singapore 4,638 Stockholm 6,683 Sydney 27,556 Tehran 5,225 Vienna 4,389