(multiple estimates since they don't exactly line up squarely)
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[PDF] http://minerals.usgs.gov/minerals/pubs/commodity/platinum/my...
On page 4, it says 2014 global consumption of Ir was 6100kg. (3rd last para).
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https://en.wikipedia.org/wiki/Iridium
Wikipedia article para 2 says global consumption and production is three tonnes.
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http://www.bloomberg.com/news/articles/2014-02-19/iridium-cl...
This (2014) article estimates global production as 129,000 ounces to 322,000 ounces, which is about 3500 kg to 9000 kg.