The risk for skin damage and skin cancer is related to the number of sunburns a person experiences throughout his or her lifetime. The following physical characteristics also increase the risk for sunburn, skin damage, and skin cancer:
Retention rates are a measure of academic progression of a group of students from one. period of time to the next. Graduation rates are a measure of the success of those students. in attaining their academic goals.
The survey found that the average nonprofit donor retention rate is only 41 percent, compared to a customer retention rate of 94 percent for businesses. The average new donor retention rate is only 27 percent.