A bar graph titled "Hodgkin's disease: number of patients included in the investigation (either incidence nor prevalence) by country and sex, age group: 75-99 years, years of diagnosis: 1990-1994, source: SEER and Eurcare3, logarithmic scale" shows the number of patients included in the investigation by country and sex, age group, and years of diagnosis for the years 1990-1994.