The population of the World’s developed countries is currently a little over 1.3 billion people. This is about 17% of the world population today and will be about 50% of the world population by 2050.
China, Mexico, Thailand and Turkey will join the developed countries by 2030. The developed countries will be about 3 billion out of 8.5 billion in 2030. This will be 35%.
India and most of the rest of Asia will join the developed ranks by 2050. This will be 5.5 billion out of 10 billion.
Very-high Developed and high income
The Human Development Index (HDI) which has become the standard for a measuring country’s level of development. Countries are put into four classes of development by HDI:
very high (1-0.8),
low (below 0.55).
China is currently at 0.752 on the HDI ranking. At a pace of 0.004 improvement per year then China will reach very high ranking by 2030.
Mexico, Thailand and Turkey will join the developed countries ranks at about the same time as China.
China, Mexico, Thailand and Turkey reaching the ranks of the developed countries will more than double the population of developed countries to about 3 billion.
The World Bank income level ranking has a close correlation to the Human Development Index.
Rest of Asia moving to developed by 2050
Indonesia and the Philippines will be moving from low-middle income to upper middle income in 2020. India and Vietnam will reach upper-middle-income around 2026. Around 2040, they should all reach high-income ranking.