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The net annual rise therefore is 100% manmade.

Horse hockey. This is an opinion and not proven fact.

Besides there is no such thing as man made - the stored hydrocarbons were once biologic creatures, so it is all natural. Unless you believe in abiogenic petroleum which has not been disproven IMO. I consider it a a viable theory.

No, not an opinion, but also not a "fact". It is merely a well-supported hypothesis. If mankind were not around the natural ocean warming after the Little Ice Age would have produced about 5-10 ppm rise in CO2. That's based on 1C of deep ocean warming and well supported gas diffusion laws. What we have seen instead is a much higher rise in CO2, 5-10 ppm every few years, which cannot be due to ocean warming. If not ocean warming, then it could be deforestation, and that is indeed part of the rise. Another possibility is volcanic actiity. The big volcanoes don't emit that much CO2 but there are 1000's of smaller volcanoes and CO2 vents of various sorts.

To support volcano hypothesis, one must show why volanic activity started up around 1850-1950, why it is much higher today than in the past, why it was not happening in the last 20k years for which we have good data (annual resolution ice cores).

It's a real stretch to say the CO2 is natural from volcanoes and basically impossible to be from warming. That leaves fossil and biosphere, and that is the current consensus.