From 2013 to 2023, Finland's slate market witnessed a progressive decline in per capita value, dropping from $0.37 to $0.14. The year-on-year percentage change from 2022 to 2023 was a decline of approximately 12.5%, while the previous year's (2021 to 2022) change was steady at around 5.9% negative. The compound annual growth rate (CAGR) from 2018 to 2023 indicates an average annual decline of roughly 10.7%.

Future trends to watch for include:

Potential stabilization in market prices following recent years' declines.
The impact of technological advancements and alternative materials on the slate industry.
Environmental regulations affecting mining and production processes.