Newly initiated NTD-related clinical trials per year.

The total annual number is shown as the grey solid line, the number of PPP programs (n = 774) as the red solid line, the two-period moving average trendline as the red dotted line, the number of Non-PPP programs (n = 401) as the solid blue line, and the two-period moving average trendline as the blue dotted line. The Y-axis describes the number of clinical trials, and the X-axis indicates the newly initiated year.