user: Question: How many years were they nominated for outstanding musical?
Columns: ['Year', 'Award', 'Category', 'Nominee', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1988.0, 'Tony Award', 'Best Musical', 'Best Musical', 'Nominated']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Nominee" = 'outstanding musical';