Hi Bruce,
Edgar Hertwich (my former professor at NTNU) published an article in 2019 that showed a breakdown for carbon footprint of material production in 2015. Here is a screenshot image from the article.
His figures are also shown in the UNEP Emissions Gap Report 2019.
There seem to be some slight differences in the data between the table and the chart. Not quite sure why that is. But hopefully this helps.
Cheers,
Anthony