Does anyone know where where Ray Audette got the following 95% figure?

"Diseases of the immune system include arthritis, diabetes, allergies,
colitis, Crohn's disease, multiple sclerosis, Alzheimer's, endometriosis,
many forms of cancer, lupus, and most arterial diseases (heart attacks and
strokes). The overwhelming majority (95 percent) of people in developed
countries will die of immune system-related diseases." --NeanderThin, p. 20