Table schema:
CREATE TABLE table_name_68 (year VARCHAR, award VARCHAR, result VARCHAR, category VARCHAR)

Question: What is the total number of Year, when Result is "Nominated", when Category is "Outstanding Actor in a Musical", and when Award is "Drama Desk Award"?
SQL: SELECT COUNT(year) FROM table_name_68 WHERE result = "nominated" AND category = "outstanding actor in a musical" AND award = "drama desk award"