Thanks Kenneth, very useful and relevant relation. I am not quite sure whether per capita mineral consumption elasticity performs like oil does.

I tracked copper consumption here: p. 8 of the document:

https://www.academia.edu/6634645/Monte_Carlo_Analysis_of_Stakeholder_Interest_in_Oyu_Tolgoi_Minerals_Working_Draft_05_01_2014_with_Excel_Workbook_

In general, the minerals associations / trade unions produce reams of statistical data on consumption.

Also, try Quandl.com

Thanks Lyndon, let me look at your data.

Minerals for EU portal might contain data relevant to your question:

http://minerals4eu.brgm-rec.fr/

http://minerals4eu.brgm-rec.fr/

Thanks Tuomo

Many studies show that metal consumption per capita is well predicted by GDP per capita because consumption has been shown to increase with increasing income, but levels off, or even declines with high income (Radetzki and Tilton 1990; Menzie et al. 2005; Singer and Menzie 2009, 2010; Jaunky 2012; Puchkov 2005). There is persuasive evidence that per capita consumption of minerals levels off with higher per capita income, which is significant if one attempts to predict future demand of minerals. 

Thanks Donald and Kenneth, future demand of minerals seems to be a key issue. Higher incomes increase the consumption of technological goods made from minerals. They also demand further infrastructure and energy.