In the United States vitamin E supplement use by female health professionals was 16.1% in 1986, 46.2% in 1998, 44.3% in 2002, but decreased to 19.8% in 2006. Similarly, for male health professionals, rates for same years were 18.9%, 52.0%, 49.4% and 24.5%. The authors theorized that declining use in these populations may have due to publications of studies that showed either no benefits or negative consequences from vitamin E supplements. Within the US military services, vitamin prescriptions written for active, reserve and retired military, and their dependents, were tracked over years 2007-2011. Vitamin E prescriptions decreased by 53% while vitamin C remained constant and vitamin D increased by 454%. A report on vitamin E sales volume in the US documented a 50% decrease between 2000 and 2006, with a cause attributed to a  meta-analysis that had concluded that high-dosage vitamin E increased all-cause mortality.

Question: What year was vitamin E supplement use the highest by female health professionals?
Answer: 1998

Question: How many percent higher was Vitamin E supplement use by female health professionals in 2006 over 1986?
Answer: 3.7

Question: What gender of health professionals used vitamin E supplements the least each year?
Answer: female

Question: How many total percent more did male health professionals use vitamin E supplements?
Answer: 18.4

Question: What year was vitamin E supplements used more for both male and female health professionals?
Answer: 1998

Question: How many percent did usage of Vitamin E decrease in the four years after 2002?
Answer: 24.5

Question: How many percent did Vitamin E use increase from 1986 to 1998?
Answer: 30.1

Question: How many percent more was the increase from 1986 to 1998 than the decrease from 2002 to 2006?
Answer: 5.6

Question: How many percent higher was the male professional recommendation than the female's in 2006?
Answer: 4.7

Question: What was the highest percentage of Vitamin E use by either male or female health professionals?
Answer: 52.0%

Question: Which year had the highest difference between male and female doctor recommendation of Vitamin E?
Answer: 1998

Question: By how many percentage points did the female and male professional usage of Vitamin E differ in 1986?
Answer: 2.8

Question: From 2007-2001, which two vitamin use changed by more than 50%?
Answer: Vitamin E

Question: How many years saw over 44% of female health professionals using a vitamin E supplement?
Answer: 2

Question: Which group saw year periods where vitamin E supplement use was 49% or above, male health professionals or female health professionals?
Answer: male health professionals

Question: Which vitamin supplement was the most used by those in the military during 2007-2011, vitamin E, vitamin C, or vitamin D?
Answer: vitamin D

Question: How many percent was the decrease in 2006 from 2002 of the female health professionals using a vitamin E supplement?
Answer: 24.5

Question: How many years did a 50% decrease of vitamin E sales volume happen?
Answer: 6