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It looks as if you’re trying to visit a page we no longer maintain. Over the years, we have created many bespoke pieces of interactive journalism, and some pieces created using older or obsolete tools or technologies can no longer be accessed. When this happens we remove the interactive from our website and app.

We hope you continue to enjoy our more recent interactives and data visualisations - you can keep up with our latest work at theguardian.com/interactive