CREATE TABLE table_71307 ("Member countries" TEXT, "Population" TEXT, "Area  ( km\\u00b2 ) " TEXT, "GDP  ( billion US$ ) " TEXT, "GDP per capita  ( US$ ) " TEXT)

What is the total population of the country that has a GDP per capita (US$) of 15,054?
SELECT "Population" FROM table_71307 WHERE "GDP per capita (US$)" = '15,054'
SELECT "Population" FROM "table_71307" WHERE "GDP per capita (US$)" = '15,054'