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

### Instruction:
How many countries spent at least $51.0 billion in international tourism in 2012?

### Inputs:
table_name: table, columns: ['Rank 2012', 'Country', 'UNWTO Region', 'International tourism expenditure 2011', 'International tourism expenditure 2012', '% change']

### Response:
SELECT MAX Rank 2012 FROM table WHERE International tourism expenditure 2011 = $51.0 billion