Ukraine topped the list with 12.7 per cent, followed by Russia (11.9 per cent), Venezuela (10.3 per cent), Singapore (9.4 per cent), Kenya (8.5 per cent) and the US (8.3 per cent).
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Ukraine topped the list with 12.7 per cent, followed by Russia (11.9 per cent), Venezuela (10.3 per cent), Singapore (9.4 per cent), Kenya (8.5 per cent) and the US (8.3 per cent).
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