Just as I thought. You are completely unable to say what the effect of cloudiness has been on climate over the last 30 years. Clouds are formed from water vapour. No vapour = no clouds.
Your assumption is that everything is driven by CO2 and virtually nothing else.
I have an open mind and have always had the view that clouds are a big part of the process. Scientists haven't been able to pin down the overall effect of cloudiness as its complicated. The USA has had an increase in cloudiness over the last 30 years. This may well have been a decent part in their changed climate.