<P> Physical coins generally have a higher premium, for example silver eagles coins released from the US mint at a $2 premium to official distributors who then sell coins for a mark up of $2.30 to $2.50 to customers depending on market conditions . </P> <P> In recent years ecommerce growth in the physical bullion industry has seen premiums reduced for retail investors to purchase products online with door to door shipping . Many online dealers provide international shipping and weekly discounts on a wide range of products . </P> <Table> <Tr> <Th> Year </Th> <Th> Silver price (yearly cum . avg .) US $/ ozt </Th> <Th> Gold price (yearly cum . avg .) US $/ ozt </Th> <Th> Gold / silver ratio </Th> <Th> World Silver Reserves (in tons) </Th> <Th> World Mining Production (tons) </Th> <Th> Reserve / Production Ratio </Th> </Tr> <Tr> <Td> 1840 </Td> <Td> 1.29 </Td> <Td> 20 </Td> <Td> 15.5 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1900 </Td> <Td> 0.64 </Td> <Td> 20 </Td> <Td> 31.9 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1920 </Td> <Td> 0.65 </Td> <Td> 20 </Td> <Td> 31.6 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1940 </Td> <Td> 0.34 </Td> <Td> 33 </Td> <Td> 97.3 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1960 </Td> <Td> 0.91 </Td> <Td> 35 </Td> <Td> 38.6 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1970 </Td> <Td> 1.63 </Td> <Td> 35 </Td> <Td> 22.0 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 1980 </Td> <Td> 16.39 </Td> <Td> 612 </Td> <Td> 37.4 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> </Td> <Td> 4.06 </Td> <Td> 383 </Td> <Td> 94.3 </Td> <Td> N / A </Td> <Td> N / A </Td> <Td> N / A </Td> </Tr> <Tr> <Td> 2000 </Td> <Td> 4.95 </Td> <Td> 279 </Td> <Td> 56.4 </Td> <Td> 430,000 </Td> <Td> 17,700 </Td> <Td> 24.3 </Td> </Tr> <Tr> <Td> </Td> <Td> 4.37 </Td> <Td> 271 </Td> <Td> 62.0 </Td> <Td> 520,000 </Td> <Td> 18,700 </Td> <Td> 27.8 </Td> </Tr> <Tr> <Td> 2002 </Td> <Td> 4.60 </Td> <Td> 310 </Td> <Td> 67.4 </Td> <Td> 570,000 </Td> <Td> 20,000 </Td> <Td> 28.5 </Td> </Tr> <Tr> <Td> 2003 </Td> <Td> 4.88 </Td> <Td> 363 </Td> <Td> 74.4 </Td> <Td> 570,000 </Td> <Td> 18,800 </Td> <Td> 30.3 </Td> </Tr> <Tr> <Td> </Td> <Td> 6.67 </Td> <Td> 410 </Td> <Td> 61.5 </Td> <Td> 570,000 </Td> <Td> 19,700 </Td> <Td> 28.9 </Td> </Tr> <Tr> <Td> 2005 </Td> <Td> 7.32 </Td> <Td> 445 </Td> <Td> 60.8 </Td> <Td> 570,000 </Td> <Td> 19,300 </Td> <Td> 29.5 </Td> </Tr> <Tr> <Td> 2006 </Td> <Td> 11.55 </Td> <Td> 603 </Td> <Td> 52.2 </Td> <Td> 570,000 </Td> <Td> 20,200 </Td> <Td> 28.2 </Td> </Tr> <Tr> <Td> 2007 </Td> <Td> 13.38 </Td> <Td> 695 </Td> <Td> 52.0 </Td> <Td> 570,000 </Td> <Td> 20,800 </Td> <Td> 27.4 </Td> </Tr> <Tr> <Td> 2008 </Td> <Td> 14.99 </Td> <Td> 872 </Td> <Td> 58.1 </Td> <Td> 570,000 </Td> <Td> 21,300 </Td> <Td> 26.8 </Td> </Tr> <Tr> <Td> 2009 </Td> <Td> 14.67 </Td> <Td> 972 </Td> <Td> 66.3 </Td> <Td> 550,000 </Td> <Td> 21,800 </Td> <Td> 25.2 </Td> </Tr> <Tr> <Td> </Td> <Td> 20.19 </Td> <Td> 1,225 </Td> <Td> 60.7 </Td> <Td> 525,000 </Td> <Td> 23,100 </Td> <Td> 22.7 </Td> </Tr> <Tr> <Td> 2011 </Td> <Td> 35.12 </Td> <Td> 1,572 </Td> <Td> 44.7 </Td> <Td> 550,000 </Td> <Td> 23,300 </Td> <Td> 23.6 </Td> </Tr> <Tr> <Td> 2012 </Td> <Td> 31.15 </Td> <Td> 1,669 </Td> <Td> 53.6 </Td> <Td> 560,000 </Td> <Td> 25,500 </Td> <Td> 22.0 </Td> </Tr> <Tr> <Td> 2013 </Td> <Td> 23.79 </Td> <Td> 1,411 </Td> <Td> 59.3 </Td> <Td> 540,000 </Td> <Td> 26,000 </Td> <Td> 20.8 </Td> </Tr> <Tr> <Td> 2014 </Td> <Td> 19.64 </Td> <Td> 1,280 </Td> <Td> 65.2 </Td> <Td> 550,000 </Td> <Td> 26,800 </Td> <Td> 20.5 </Td> </Tr> <Tr> <Td> 2015 </Td> <Td> 15.68 </Td> <Td> 1,160 </Td> <Td> 74.5 </Td> <Td> 570,000 </Td> <Td> 25,100 </Td> <Td> 22.7 </Td> </Tr> </Table> <Tr> <Th> Year </Th> <Th> Silver price (yearly cum . avg .) US $/ ozt </Th> <Th> Gold price (yearly cum . avg .) US $/ ozt </Th> <Th> Gold / silver ratio </Th> <Th> World Silver Reserves (in tons) </Th> <Th> World Mining Production (tons) </Th> <Th> Reserve / Production Ratio </Th> </Tr>

What is the average price of silver per ounce
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