Glioma epidemiology is segmented as Total Incident Population of Glioma, Grade-specific Incident Population of Glioma, Type-specific Population of High-grade Glioma (including Diffuse Midline Glioma, Glioblastoma, and others), Type-specific Population of Low-grade Glioma (including Diffuse astrocytoma, Pilocytic Astrocytoma, and others), Age-specific Population of Glioma, and Glioma Cases Based on Molecular Alterations.