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_168 ( id number, "team name" text, "leagues" text, "base" text, "year started" text, "year ended" text, "notable riders" text )

### Question ###
how many teams were ended in the last ten years ?

### Accurate SQL ###

SELECT COUNT("team name") FROM table_203_168 WHERE "year ended" >= present_ref - 10