The risk of dying from heart disease and strokes is about 2 in 5. The death rate from almost all causes is decreasing, significantly so for heart disease and strokes. Death rate means the annual number of deaths per 100,000 population. We are living longer and healthier. With the exception of lung cancer the death rates for almost all cancers have either decreased dramatically or remained stable for the past 60 years.
Cancer is the leading illness related cause of death in children.
This is because there is not much else for them to die of, they don't get strokes heart attacks, emphysema, complications from diabetes or other chronic diseases. There are only about 1,600 cancer deaths a year in children, but there are about 7,500 deaths due to accidents and trauma, which is the leading cause of death in children aged 1-14 years. Cancer became a reportable disease in California in 1985, so there are reasonably accurate statistics for the state. California has about one tenth of the US population with about the same distribution of cancers so you can extrapolate these numbers the the US as a whole. The risk of developing any cancer within the next year is low for every age group.