Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many values were used to express the years at school of the Maryland team?

### Inputs:
table_name: table, columns: ['Team', 'Head Coach', 'Years at School', 'Overall Record', 'Record at School', 'ACC Record']

### Response:
SELECT COUNT Years at School FROM table WHERE Team = Maryland