Sorry to interrupt and I'm far from a conspiracy theorist but I'd put it at around 1/4 - Just look at who have benefitted from it most, the Western Worlds economies have gone to shit whilst Chinas has rocketed relative to all others on the planet - also they have been overpopulated for a long long time which has been addressed by the one child policy but that has recently ended resulting in a very very aged population at present and who are the ones dying most from the pandemic - yes you guessed it the elderly, now I won't go so far as to say it's a cull of their population but god only knows how many aged people have died over there.
Something to dwell on from the NY Times:
"A decline in the birth rate and an increase in life expectancy means there will soon be too few workers able to support an enormous and aging population"
You must be logged on to see external links
and from the Financial Times re their rocketing output post-Covid rate:
You must be logged on to see external links
"China’s output leapt 18.3 per cent year on year in the first three months, the fastest rate since records began in the early 1990s."
Bottom line is it only serves to make one wonder..