In medicine–in this case oncology–the "incidence rate" is the number of new disease cases that will occur in a given population.
According to the Leukemia and Lymphoma Society, Hodgkin's Lymphoma represents about 11% of all lymphoma diagnoses. Approximately 8,000 cases (4,400 males and 3,820 females) of Hodgkin's Lymphoma are detected per year which represents less than 1% of all cancers. Nevertheless, this is a still a significant disease worldwide and incidents are on the rise.
From The National Cancer Institute's SEER program. Numbers are based on cases diagnosed in 2002-2006 from 17 SEER geographic areas.
3.0% were diagnosed under age 20; 7.5% between 20 and 34; 8.4% between 35 and 44; 13.7% between 45 and 54; 17.8% between 55 and 64; 20.4% between 65 and 74; 21.4% between 75 and 84; and 7.8% 85+ years of age.
Men
Women
More data can be found on the SEER page for Hodgkin's Lymphoma.