The left graph uses GDP at market prices, current prices, converted to PPS (purchasing power standard), which allows meaningful volume comparisons of GDP across European countries and benchmark country performance in a particular year. The right graph refers to GDP at constant market prices, which allows consistent GDP time series in a particular country.
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By having aerators and water flow restrictors fitted on your taps, the flow of water will feel stronger, but will consist of less water and more air. Aerated taps can reduce the water flow by 30-40 %.
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