What barriers hinder nursing practice from achieving evidence-based practice goal?

The Institute of Medicine has stated a goal that 90% of practice be evidence-based by 2020. According to HealthyPeople.gov, the United States is currently at approximately 15%. Discuss two barriers that might hold nursing practice from achieving this goal and suggest ways in which identified barriers may be addressed.  
Answer preview :
evidence-based practice goal
Word limit : 593