Crossword was introduced in Q2 2013. Statistics The OECD is known as a statistical agency, as it publishes comparable statistics on numerous subjects. In July 2014, the OECD publicly released its main statistical databases through the OECD Data Portal, an online platform that allows visitors to create custom charts based on official OECD indicators. OECD statistics are available in several forms: as interactive charts on the OECD Data Portal, as interactive databases on iLibrary together with key comparative and country tables, as static files or dynamic database views on the OECD Statistics portal, as StatLinks (in most OECD books, there is a URL that links to the underlying data). Working papers There are 15 working papers series published by the various directorates of the OECD Secretariat. They are available on iLibrary, as well as on many specialised portals. Reference works The OECD is responsible for the OECD Guidelines for the Testing of Chemicals, a continuously updated document that is a de facto standard (i.e., soft law). It has published the OECD Environmental Outlook to 2030, which shows that tackling the key environmental problems we face today—including climate change, biodiversity loss, water scarcity, and the health impacts of pollution—is both achievable and affordable. Structure The OECD's structure consists of three main elements: The OECD member countries, each represented by a delegation led by an ambassador. Together, they form the OECD Council. Member countries act collectively through Council (and its Standing Committees) to provide direction and guidance to the work of Organisation. The OECD Substantive Committees, one for each work area of the OECD, plus their various subsidiary bodies. Committee members are typically subject-matter experts from member and non-member governments. The Committees oversee all the work on each theme (publications, task forces, conferences, and so on). Committee members then relay the conclusions to their capitals. The OECD Secretariat, led by the Secretary-General (currently Mathias Cormann), provides support to Standing and Substantive Committees. It is organised into Directorates, which include about 2,500 staff. Meetings Delegates from the member countries attend committee and other meetings. Former Deputy Secretary-General estimated in 1997 that the cost borne by the member countries, such as sending their officials to OECD meetings and maintaining permanent delegations, is equivalent to the cost of running the secretariat. This ratio is unique among inter-governmental organisations. In other words, the OECD is more a persistent forum or network of officials and experts than