Add a label for the x-axis to column charts on hover
Add a label for the x-axis to column charts on hover

This makes it easier to navigate the charts

unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/polio,unicef/rhizome,unicef/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio