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 team (team_id_br VARCHAR, name VARCHAR)
TABLE: CREATE TABLE postseason (year VARCHAR, team_id_winner VARCHAR)

### Question ###
What is the number of wins the team Boston Red Stockings got in the postseasons each year in history?

### Accurate SQL ###

SELECT COUNT(*), T1.year FROM postseason AS T1 JOIN team AS T2 ON T1.team_id_winner = T2.team_id_br WHERE T2.name = 'Boston Red Stockings' GROUP BY T1.year