An sociological index invented by myself, representing the pressure students have to bear in a specific country/region.
“大约从2018年开始，“内卷”一词在**大陆变得广为人知，
并引申表示付出大量努力却因递减定律而得不到等价的回报，必须在竞争中超过他人的社会文化，
包含了恶性竞争、逐底竞争等更为负面的含义。“
INVI (Involution Index) = (UMC line (Upper middle class control line) - LMC line (Lower middle class control line)) * EduRate (Ratio of education expenditure to household expenditure) * Gini (Gini coefficient) * HDI (Human Development Index) / GNI per capita (Per capita income)
Regions with a value less than 0.5 have basically no education pressure - low
Regions with a value more than 0.5 starts to have greater education pressure - medium
Regions with a value more than 1.0 starts to have extreme education pressure, also known as "involute" - high
Regions with a value more than 5.0 starts to have ultra-extreme education pressure, entering "hell mode" - very high
-United States 0.770229639 - medium
-China
-Mainland 11.986645828 - very high
-Taiwan 1.48130129 - high
-Hong Kong 15.61693913 - very high
-Macao 3.031406463 - high
-India 8.670158816 - very high
-South Korea 2.297994079 - high
-Singapore 1.129191021 - high
-Canada 0.683435935 - medium
-United Kingdom 0.657862343 - medium
-Ireland 0.187931957 - low
-Germany(Deutschland) 0.147370728 - low
-France 0.252708232 - low
-Netherlands 0.88503313 - medium
-Italy 0.323740838 - low
-Russia 0.029867116 - low
-Finland(Suomi) 0.290980783 - low
-Estonia 0.530192181 - medium
-Sweden 0.230147737 - low
-Denmark 0.231855344 - low
-Norway 0.057247238 - low
-Australia 0.830094774 - medium
-Japan 0.370509724 - low