you're quoting Purchasing Power Parity figures there which distorts things somewhat, China's economy is certainly nowhere near 4x that of the UK!inefficient said:Just to put things in the correct perspective.
US population: 296 mil
GNP $11.75 trillion
China population 1,306 mil
GNP $7.262 trillion
Japan pop: 127 mil
GNP $3.745 trillion
UK pop: 60 mil
GNP $1.782 trillion
Canada pop: 33 mil
GNP $1.023 trillion
UK GDP is ~$2.1 trillion
China GDP is ~$2.0 trillion
Japan GDP is ~$4.5 trillion
US GDP is ~$11 trillion
FWIW EU GDP as a whole is slightly larger than US albeit with many more people so per capita is significantly less.