Using Web of Science (WoS) we collected data on each nations h5-index and number of publications for the five-year period 2016 to 2020. 
Web of Science
Neurosurgical data was collected from the Global Neurosurgical Workforce Map provided by the World Federation of Neurosurgical Societies. 
Global Neurosurgical Workforce Map
Neurosurgical data was collected from the Global Neurosurgical Workforce Map provided by the World Federation of Neurosurgical Societies. 
World Federation of Neurosurgical Societies
National economic data was collected form the World Bank Open Data provided. 
World Bank Open Data