The major purpose of this exercise is to select one and only one category of health care service of interest to you, and explore trends in funding magnitude and source of funds, over decades. A key point is to connect trends in funding in that category with the sources of funds for that category. For example, suppose you're interested in pharmaceutical spending. As you will, the annual percentage of total healthcare spending on pharmaceuticals has varied markedly over decades. Similarly, the sources of funds to cover that spending have also evolved - in other words, the fraction annually contributed by Medicare, Medicaid, private insurance, out of pocket, and other sources continues to change