40 Home Run count per year, per team.

Number of players to hit at least 40 Home Runs in a season divided by the number of teams. Click this link to view all the data from 1920 through 2016. Below is the graph and seasons when the per team average was at least 25% or among many (1953-1961).

Year

P/T

P

T

Max

Min

Ave

1930

25.00%

4

16

56

40

47

1953	37.50%	6	16	47	40	43
1954	37.50%	6	16	49	40	42
1955	37.50%	6	16	51	40	44
1956	12.50%	2	16	52	43	48
1957	25.00%	4	16	44	40	42
1958	18.75%	3	16	47	41	43
1959	25.00%	4	16	46	42	44
1960	18.75%	3	16	41	40	40
1961	44.44%	8	18	61	40	47

1969	29.17%	7	24	49	40	45
1970	25.00%	6	24	45	40	42

1996	60.71%	17	28	52	40	44
1997	42.86%	12	28	58	40	44
1998	43.33%	13	30	70	40	49
1999	43.33%	13	30	65	40	47
2000	53.33%	16	30	50	40	44
2001	40.00%	12	30	73	41	51
2002	26.67%	8	30	57	41	47
2003	33.33%	10	30	47	40	44
2004	30.00%	9	30	48	41	44
2005	30.00%	9	30	51	40	45
2006	36.67%	11	30	58	40	46

2015	30.00%	9	30	47	40	43
2016	26.67%	8	30	47	40	42

Year

P/T

P

T

Max

Min

Ave

1961 (third highest percent all time) and 1969 were expansion years. So were 1993 and 1997 but there was a Home Run explosion in 1996. Then a lull, which coincided with increased PED testing. Now in 2015 and 2016, a resurgence.

Holy Roger Maris, Batman!