The largest concentrations of mature elms in Europe are now in Amsterdam and The Hague. In 2005, Amsterdam was declared the Elm City of Europe: the city's streets and canals are lined with at least 75,000 elms, including several generations of research-elms (see below: Resistant trees). Some 30,000 of the 100,000 mature trees in The Hague are elms, planted because of their tolerance of salty sea-winds. Since the 1990s, a programme of antifungal injections of the most prominent 10,000 elms, and of sanitation felling, has reduced annual elm losses in The Hague from 7% to less than 1% (see below: Preventive treatment). The losses are made up by the planting of disease-resistant cultivars. The largest concentration of mature elm trees remaining in England is in Brighton and Hove, East Sussex, where of the 30,000 elms in 1983 15,000 still stand (2005 figures), several of which are estimated to be over 400 years old. Their survival is owing to the isolation of the area, between the English Channel and the South Downs, and the assiduous efforts of local authorities to identify and remove infected sections of trees immediately when they show symptoms of the disease. Empowered by the Dutch Elm Disease (Local Authorities) (Amendment) Order 1988, local authorities may order the destruction of any infected trees or timber, although in practice they usually do it themselves, successfully reducing the numbers of elm bark beetle Scolytus spp., the vector of elm disease. Sanitary felling has also, to date, preserved most of the 250,000 elms on the Isle of Man, where average temperature and wind speed inhibit the activity of the beetles, which need a temperature of at least 20 degrees to fly and a wind speed of less than five metres per second. The largest concentration of mature elms in Scotland is in Edinburgh, where over 5000 remained in 2009 from some 35,000 in 1976. The city council gives the overall number of elms as 15,000 (2016). Edinburgh's Leith Links and Meadows have some of the highest concentrations of mature elms among U.K. parks (2014). A policy of sanitary felling has kept losses in the city to an average of 1000 a year. Elm was the most common tree in Paris from the 17th century; before the 1970s there were some 30,000 ormes parisiens. Today, only 1000 mature elms survive in the city, including examples in the large avenues (Avenue d'Italie, Avenue de Choisy, Boulevard Lefebvre, Boulevard de Grenelle, Boulevard Garibaldi) and two very old specimens, one in the garden of the Tuileries in front of the l'Orangerie and another in the Place Saint-Gervais in front of l'hôtel de ville de Paris. Losses are now being made up with disease-resistant cultivars, especially the Dutch-French research elm 'Nanguen' (Lutèce), named for the ancient Roman name for the city: Lutetia.