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 (_percentage_change VARCHAR, international_tourism_expenditure_2012 VARCHAR)

### Question ###
How many countries spent $83.7 billion on international tourism in 2012?

### Accurate SQL ###

SELECT COUNT(_percentage_change) FROM table_29789_3 WHERE international_tourism_expenditure_2012 = "$83.7 billion"