in the 1935 NL there were 662 homers hit, there were 663 that year in the AL, thats 1325 homers or 82.8 per team (there were then 16 teams). in the 2005 NL there were 2580 homers hit, there were 2437 in the AL, thats 5047 homers, or 167 per team, twice as many homes per team as the 1935 level. edit- i realize this is only a snapshot of two years and that if i really wanted to i'd do 1930-1940 and 1995-2005 but i think this snapshot alone helps make my point.