A district health office in rural Rajasthan screens 10,000 adults aged 40–60 years for type 2 diabetes mellitus (DM) in March 2024. Among them, 800 individuals are found to have diabetes (both newly diagnosed and previously known cases). The district maintains a stable adult population of 100,000 in this age group. Over the next 12 months (April 2024–March 2025), 120 new cases of type 2 DM are diagnosed among the 9,200 individuals who were initially diabetes-free. What is the incidence rate of type 2 DM in this population during the 12-month follow-up period, expressed per 1000 person-years?