This gallery example presents two coordinated D3.js visualizations of global health statistics. The first chart is a histogram displaying the distribution of health expenditure as a percentage of GDP, using `d3.histogram` with interactive tooltips that reveal bin ranges and counts. The second chart is a scatter plot matrix exploring correlations between three health expenditure variables, employing `d3.scaleLinear` and `d3.axis`. Data is loaded from a CSV file via `d3.csv` and rendered as SVG elements within distinct chart containers.