The total amount of silver mined in global history is enough to create a 52m cube. The amount of silver available to the market each year depends chiefly on mine production and scrap metal recycling. In 2013, silver scrap reached its lowest levels since 2001 to 5,966 tonnes, or under 20% of supply.
See part I here
The Silver Series: Who Controls The World’s Supply?
Infographic source: Visual Capitalist