The overall index score was determined by performance in 26 image attributes across five key association dimensions: Value System, Quality of Life, Good for Business, Heritage and Culture, and Tourism.

FORBES: Switzerland Tops Ranking of 25 Best Country Brands

The Index is a rules-based, modified global-capitalization-weighted, float-adjusted index intended to give investors a means of tracking the overall performance of a global universe of listed companies engaged in the solar energy industry.

FORBES: Obama Shines On Solar, ETFs Will Benefit