Kind of unrelated – but it really bugs me when organisations quote figures like 500,000 deaths from cancer each year without qualifying it or putting it in any sort of context.
So if we say the USA has roughly 300million people and they live and average of 80 years (just ballpark figures). Then the annual replacement rate is 300m/80 = 3.75m. So the figure of 500,000 would mean only ~13% of people die from cancer. Since everyone has to die from something then all that means is those dying from cancer are not dying from anything else. Wanting to reduce the death rate from cancer implies we want to grow the population. Only if we ensure a simultaneously reduced birth rate does it lead to just living longer.
In actual fact the birth/death +immigration/emigration rates are not equal, with the total deaths in the US lower at only ~2m per year. The full breakdown from the CDC for 2010 is
Heart disease: 597,689
Cancer: 574,743
Chronic lower respiratory diseases: 138,080
Stroke (cerebrovascular diseases): 129,476
Accidents (unintentional injuries): 120,859
Alzheimer’s disease: 83,494
Diabetes: 69,071
Nephritis, nephrotic syndrome, and nephrosis: 50,476
Influenza and Pneumonia: 50,097
Intentional self-harm (suicide): 38,364
http://www.cdc.gov/nchs/fastats/lcod.htm