How to calculate flu vaccination rate by year month?
I am trying to calculate the flu vaccination rates dynamically based upon user's selection in year and month. The flu vaccine is generally given from October to March. When 201608 is selected, the vaccination rate should be 33% (2015-16 season). When 201703 is selected, the vaccination rate should be 75% (2016-17 season). The green, blue and red indicate the different flu seasons. I created a small project for reference.