Since 2003, the unemployment rate amongst new college graduates has decreased from about three to a little over two percent. Why?

1. The improving economy has forced/encouraged more employers to hire more college students and recent graduates.
   
2. The war has forced/encouraged the military and other areas of the federal government to hire more college students and recent graduates.
   
3. Baby Boomers are starting to retire, forcing/encouraging more employers to hire more college students and recent graduates.