Which year (2015, 2016, or 2017) had the highest number of countries with both Freedom and Generosity scores…

Which year (2015, 2016, or 2017) had the highest number of countries with both Freedom and Generosity scores…: a task in data-agent-harbor-train (Harbor dataset). Files (in /home/user/input, no subfolders): - 2015.csv - 2016.csv - 2017.csv