First published by Money Metals here: https://www.moneymetals.com/news/2018/04/17/global-silver-scrap-supply-26-year-low-001458

Global silver scrap supply fell to its lowest level in 26 years. World silver recycling in 2017 dropped by nearly 50% since its peak in 2011. According to the 2018 World Silver Survey, global silver scrap supply declined to 138 million oz (Moz) compared to 261 Moz in 2011. While the lower silver price is partly responsible for the large drop in silver recycling, there are other market dynamics.