You are spot on with the 5 year survival concept. The newer
technologies that identify the cancers earlier increase the number of people with a six year survival rate. The six year survivors then die and radically alter the statistics without
improving the annual per capita death rate at all. The best example of this is: the breast cancer death rate in 1935 was 35 per 100,000. 60 years later the 1995 the breast cancer death rate was still 35 per 100,000. All of the treatment efforts over the sixty year period did nothing to alter the breast cancer
death rate.
IMHO, modern breast cancer treatment is really barbaric. My friend was starved her last days. I'm still angry.