More: http://news.coinupdate.com/perth-mint-gold-bullion-sales-decline-2149/
I found that interesting considering that Australian Kangeroos were the only 1 ozt gold coins my LCS was able to carry in stock at one point a while back.
http://www.usmint.gov/mint_programs/american_eagles/?action=sales&year=2012
Silver to gold ounces sold = ~54.87 : 1 ratio.
At an average (over the course of the year) GSR of say, 54, that looks to be roughly even money going into physical gold and silver from the US Mint.