One of the defining characteristics of Minor Sports Leagues is that they play to smaller crowds of fans. Minor-Leagues.com has compiled a series of posts that provides details of attendance figures.
The Carolina League (CarL) is an affiliated Single-A+ professional baseball league founded in 1945. It operates in a region stretching from Delaware to South Carolina, in cities not served by MLB teams or their other minor league affiliates.
Below is the fan attendance for the entire league from 2006 to 2013.
|League||Sport||Season||# of Teams||Team Change||Games||Games Change||Total Attendance||TA Change||Average Attendance||AA Change||Source|
|Carolina League (A)||Baseball||2006||8 USA||untracked||525||untracked||1,601,427||untracked||3,050||untracked||http://www.numbertamer.com/files/2007_Minor_League_PDF.pdf|
|Carolina League (A)||Baseball||2007||8 USA||0.00%||346||-34.14%||1,668,811||4.21%||4,826||58.23%||http://www.numbertamer.com/files/2007_Minor_League_PDF.pdf|
|Carolina League (A)||Baseball||2008||8 USA||0.00%||535||54.72%||1,726,511||3.46%||3,227||-33.13%||http://www.numbertamer.com/files/2009_Minor_League_Analysis.pdf|
|Carolina League (A)||Baseball||2009||8 USA||0.00%||518||-3.18%||1,586,588||-8.10%||3,063||-5.08%||http://www.numbertamer.com/files/2009_Minor_League_Analysis.pdf|
|Carolina League (A)||Baseball||2010||8 USA||0.00%||534||3.08%||1,810,537||14.12%||3,391||10.71%||http://www.numbertamer.com/files/2011_Minor_League_Analysis.pdf|
|Carolina League (A)||Baseball||2011||8 USA||0.00%||519||-2.79%||1,789,631||-1.15%||3,448||1.68%||http://www.numbertamer.com/files/2011_Minor_League_Analysis.pdf|
|Carolina League (A)||Baseball||2012||8 USA||0.00%||533||2.68%||1,877,081||4.89%||3,522||2.15%||http://www.numbertamer.com/files/2013_Minor_League_Analysis.pdf|
|Carolina League (A)||Baseball||2013||8 USA||0.00%||529||-0.73%||1,934,740||3.07%||3,657||3.83%||http://www.numbertamer.com/files/2013_Minor_League_Analysis.pdf|
A Single-A+ affiliate league is often a second or third promotion for a minor league player, although a few high first-round draftees, particularly those with college experience, begin at this level. These leagues play a complete season like Triple-A and Double-A, from April through to early September.