First published by Money Metals here: https://www.moneymetals.com/news/2019/01/21/global-silver-production-may-decline-more-than-analysts-forecasts-001698

The global mine supply from the top silver producing countries may decline more than the industry forecasts. The leading consultancies reported that global silver production would increase moderately by 1-2% in 2018. However, the data from several countries and large mining companies suggest that overall world silver production may decline by 2-3+%.