1 = No Experience (Theory or observation only during the past 12 months)
2 = Limited Experience (Performed less than 12 times within the past 12 months and may need a review)
3 = Experienced (Performed at least once per month within the past 12 months and may need minimal assistance)
4 = Highly Skilled (Performed on at least a weekly basis over the past 12 months; proficient)