The data indicates a clear downward trend in the volume of common clay and shale used for heavy-clay products, particularly bricks, in the US from 2015 to 2019, with a significant decline each year.

Between 2015 and 2019, the cumulative annual growth rate (CAGR) was negative, reflecting the industry's contraction during this period.

In 2023, the market stood at a significantly lower volume compared to 2015, continuing the declining pattern observed in previous years.

Future trends to watch for:

Innovations in construction materials and potential shifts towards more sustainable or alternative materials.
Economic factors influencing construction activities, including housing starts and infrastructure projects.
Environmental regulations impacting production and usage of clay and shale.