The majority of blood used is not related to surgeries:
Facts about blood needs
· Every two seconds someone in the U.S. needs blood.
· More than 44,000 blood donations are needed every day.
· A total of 30 million blood components are transfused each year in the U.S. (2006).
· The average red blood cell transfusion is approximately 3 pints.
· The blood type most often requested by hospitals is Type O.
· The blood used in an emergency is already on the shelves before the event occurs.
· Sickle cell disease affects more than 80,000 people in the U.S., 98 percent of whom are African American. Sickle cell patients can require frequent blood transfusions throughout their lives.
· More than 1 million new people are diagnosed with cancer each year. Many of them will need blood, sometimes daily, during their chemotherapy treatment.
· A single car accident victim can require as many as 100 pints of blood.
http://www.redcrossblood.org/learn-about-blood/blood-facts-and-statistics