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 browser ( market_share VARCHAR )

### Question ###
How many main stream browsers whose market share is at least 5 exist?

### Accurate SQL ###

SELECT COUNT(*) FROM browser WHERE market_share >= 5