All donors: Fans who have ever donated money
Donated recently but not this year: Fans who have donated at least once in the last five years but not in the current drive year
High, medium and low donors are based on the fan's average yearly donations (total amount ever donated divided by the number of drive years in which the fan donated).
High donors: Have an average yearly donation of over $5,000
Medium donors: Have an average yearly donation between $150 and $5,000
Low donors: Have an average yearly donation of $150 or less