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. 2015 Sep 30;10(9):e0135230. doi: 10.1371/journal.pone.0135230

Fig 1. Countries included in the study by World Bank income group classification in 2010 and geographical region.

Fig 1

Country names listed are as they appear in World Bank. HIC, high-income countries; UMIC, upper-middle-income countries; LMIC, lower-middle-income countries; LIC, low-income countries. Some countries (such as Chile and Russian Federation) have a higher income group and some countries (such as Libya) have lower income group classification as of 2015, but are illustrated and were kept in the economic bracket assigned through 2010 data in all analyses.