For me 95% of my articles were added manually by me here on RG as they were published locally in Iraq (Universities Journals). Only one research was classified as Clarivate with an IF = 2.344 which brought me two citations and H-index = 1.
Based on the research topic, there is research available up to 80% and there is no more than 20% research and there is research that can be used as referance
Have a good day today, Based on my specialization as an industrial geology; the use of raw materials in industry sectors such as cement, glass, rubber, water treatment, soda ash, mud drilling fluid chemicals, buildings & constructions, steel ... etc. in this subjects the percentages it does not pass 15 % . But for the other subjects associated with my work such as geochemistry, sedimentology and mineralogy I can say the percentages is between 80 to 85%. However, I am satisfied and happy with the amount of information available I have found on this site and thank u so much for asking me this important equestion :)
Based on your respected answers , I may infer that RG media can provide about 30%_70% resources of our research. Therefore, the chance of having the RG media is ac knowledgeable. And I wish a scientific successfully in new year for all of you.