Fig 2.

Supply of chiropractors per state by year. Chiropractors per 100 000 beneficiaries are plotted for each state per year. Each state is represented by a colored dot. The distribution of the chiropractic supply per year is plotted as a box plot. The horizontal lines of the box plot indicate the 25th, 50th, and 75th percentiles; the free ends of the whiskers represent the 5th and 95th percentiles. The high-end outlier state is North Dakota (cornflower blue, highest ending rate). Consistently low-end outliers are the District of Columbia (mustard, lowest each year) and Mississippi (teal, second lowest each year).