Primary bile duct cancer is uncommon in the United States. Each year, an estimated 8,000 people in the United States are diagnosed with bile duct cancer. The average age people are diagnosed with intrahepatic bile duct cancer is 70. For extrahepatic bile duct cancer, the average age at diagnosis is 72.

https://www.cancer.net/cancer-types/bile-duct-cancer-cholangiocarcinoma/statistics