Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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?

### Accurate SQL ###

SELECT MAX(rank_2012) FROM table_29789_3 WHERE international_tourism_expenditure_2011 = "$51.0 billion"