By these criteria, Argentina became an upper-middle-income country all the way back in 1970, and then spent 40 years stuck in that category before reaching high-income status in 2010. Greece joined the international upper middle class in 1972, and then took 28 years to reach the top income group, in 2000.
根据这些标准，阿根廷在1970年便已成为中上收入国家，此后花了40年直到2010年才打到高收入标准。希腊在1972年加入国际中上阶级行列，然后花了28年直到2000年才进入最高收入类别。