Chicago Blackhawks: chart of home attendance stats at United Center (1994-2016)

Reference 1: Attendance and Average.

Reference 2: 1994–95, 1995–96, 1996–97, 1997–98, 1998–99, 1999–00, 2000–01, 2001–02, 2002–03, 2003–04, 2005–06, 2006–07, 2007–08, 2008–09, 2009–10, 2010–11, 2011–12, 2012–13, 2013–14, 2014–15, 2015–16 and 2016–17.

Source: http://en.wikipedia.org/wiki/Chicago_Blackhawks