U periodu 1990-tih, dodaje se u njemu, "prihod po glavi stanovnika u zapadnoj Evropi bio je četiri puta veći nego u Bugarskoj, dok je jednu deceniju kasnije, taj odnos 2,5, mjeren po paritetu kupovne moći".
Back in the 1990s, it added, "per capita income in Western Europe was four times higher than that in Bulgaria, while one decade later this ratio is 2.5 measured by purchasing power parity".