Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_29789_3 (rank_2012 INTEGER, international_tourism_expenditure_2011 VARCHAR)
### Question:
How many countries spent at least $51.0 billion in international tourism in 2012?
### Answer:
SELECT MAX(rank_2012) FROM table_29789_3 WHERE international_tourism_expenditure_2011 = "$51.0 billion"