For each year, return the year and the number of times the team Boston Red Stockings won in the postseasons.
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
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
[{'count(*)': 5, 'year': 1903}, {'count(*)': 5, 'year': 1912}, {'count(*)': 5, 'year': 1915}, {'count(*)': 5, 'year': 1916}, {'count(*)': 5, 'year': 1918}, {'count(*)': 5, 'year': 1975}, {'count(*)': 5, 'year': 1986}, {'count(*)': 5, 'year': 1999}, {'count(*)': 5, 'year': 2003}, {'count(*)': 15, 'year': 2004}, {'count(*)': 15, 'year': 2007}, {'count(*)': 5, 'year': 2008}, {'count(*)': 15, 'year': 2013}]