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_203_847 ( id number, "financial year" text, "turnover" text, "profit before tax" text, "net profit" text, "partner bonuses" text, "profit retained" text )

### Question ###
what was the best year for profit before 2010 ?

### Accurate SQL ###

SELECT "financial year" FROM table_203_847 WHERE "financial year" < 2010 ORDER BY "net profit" DESC LIMIT 1