> The number of deaths from cancer has roughly tracked population growth. Is this a good metric though? It seems to me that (1) once you get cancer, you always

> The number of deaths from cancer has roughly tracked population growth. Is this a good metric though? It seems to me that (1) once you get cancer, you always have cancer, and (2) if nothing else kills you, cancer does. So maybe a better metric would be, the lifespan of people with cancer?