During a 2-year prospective cohort study in Mumbai, 10,000 initially disease-free adults aged 40–50 years were followed to assess the incidence of hypertension. At baseline (Year 0), none had hypertension. At the end of Year 1, 200 new cases of hypertension were identified. At the end of Year 2, an additional 150 new cases were identified (total 350 cases). The investigators want to calculate the cumulative incidence of hypertension over the 2-year period. What is the cumulative incidence, and what does this measure represent?