There's no real drop, but number manipulation. They just label you as "healed" if the tumor doesn't return after a some short period of time, which gets shorter by the year.
Actually mortality rates are at all times high, globally.
Actually mortality rates are at all times high, globally.
However if one looks there has been tremendous progress in some cancers. As an example CML went from a swift death sentence to something approaching a chronic condition.
The standard survival rates are quoted as 5 year survival unless the cancer is particularly aggressive eg pancreatic. The statistics around cancer are very high quality and public in most countries. However, I suspect data will not influence your view.