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There are 10 such instances. The latest happened in Oct 2016. The countries associated with the first nine countries are:

USA (1906), USA (1919), Egypt (1978), Costa Rica (1987), USSR (1990), South Africa (1993), South Korea (2000), USA (2009), and Liberia (2011).

What's the tenth and latest, and what are we talking about?

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In Jan 2017, Finland became the first country in Europe to officially experiment with this socio-economic concept. Similar experiments are scheduled for many Dutch cities and the Canadian city of Ontario in 2017. In the case of Finland, the figure is 560 Euros a month. What concept?

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