41,349 - 19,459 in the National League and 21,890 in the American League:
1999 - 2893 in the NL and 2635 in the AL.
1998 - 2565 in the NL and 2499 in the AL.
1997 - 2163 in the NL and 2477 in the AL.
1996 - 2220 in the NL and 2742 in the AL.
1995 - 1917 in the NL and 2164 in the AL.
1994 - 1532 in the NL and 1774 in the AL.
1993 - 1956 in the NL and 2074 in the AL.
1992 - 1262 in the NL and 1776 in the AL.
1991 - 1430 in the NL and 1953 in the AL.
1990 - 1521 in the NL and 1796 in the AL.
The NL had 14 teams between 1990-1997 and 16 teams in 1998-1999. The AL had 14 teams for the entire decade.
In the 2011 MLB season, there were 4552 home runs hit in 2429 MLB games for an average of 1.87 HRs per game.
There were more home runs, on average, hit in American League games than National League games. In 2011, there were 2271 home runs hit in 1134 AL games for an average of 2.00 HRs per game. There were 2281 home runs hit in 1295 NL games for an average of 1.76 HRs per game.
According to Baseball Reference, through games played on April 11, 2008 there have been 246,208 home runs hit in major league play.
Rogers Hornsby led the Major Leagues in home runs in 1925 with 39 home runs for St. Louis.
Lou Gehrig led the Major Leagues with 49 home runs for the Yankees in 1934.
Jimmie Foxx led the Major Leagues in 1933 with 48 home runs for Philadelphia.
Jimmie Foxx led the major leagues in home runs in 1932. He hit 58 for Philadelphia that year.
Babe Ruth of the New York Yankees led the Major Leagues with 46 home runs in in 1924.
Babe Ruth of the New York Yankees led the Major Leagues with 47 home runs in in 1926.
Babe Ruth of the New York Yankees led the Major Leagues with 54 home runs in in 1928.
Babe Ruth of the New York Yankees led the Major Leagues with 46 home runs in in 1929.
Babe Ruth and Cy Williams both hit 41 home runs in 1923 to lead the Major Leagues.
Babe Ruth of the New York Yankees led the Major Leagues with 54 home runs in in 1920. (A record at the time)
Babe Ruth of the New York Yankees led the Major Leagues with 59 home runs in in 1921. (A record at the time)
Babe Ruth of the New York Yankees led the Major Leagues with 60 home runs in in 1927. (A record at the time)