The UK managed to "lose" a million or so people on Thatcher introducing the Poll Tax [1]. Amusingly, various government departments explained that is was because all of the kids had gone to Ayia Napa for techno and drugs.<p>[1] <a href="https://www.independent.co.uk/news/uk/missing-million-indicates-poll-tax-factor-in-census-1557887.html" rel="nofollow noreferrer">https://www.independent.co.uk/news/uk/missing-million-indica...</a>