From CNN in 1998:
In 1996, with more than a half million cancer deaths, the National Institutes of Health dedicated $2.5 billion to cancer research. With over 32,000 AIDS deaths, $1.4 billion went to AIDS research. And with more than three-quarters of a million heart disease fatalities, $851 million went to cardiovascular research.
A blue-ribbon panel appointed by the Institute of Medicine broke it down this way: For every $10 spent per cancer death on cancer research, $110 is spent per AIDS death on AIDS research and $3 is spent per heart disease death on heart disease research.